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<page name="Espresso Notes"
>

<s name="Introduction">
	<p>
	Vacationing in Tuscany, I noticed the breakfast 
	latte was really good. In fact, it was so good, it
	wrecked the American coffee shop experience for me.
	</p>

	<p>
	When I got home, I went to <i>Coffee Machine City</i> at
	the Mega Mall. (Right next to <i>Spatula City.</i>)
	The saleswoman showed me a number of beautiful and even 
	miraculous espresso machines. Some of them, she explained, 
	wake up at 5am, roast the beans, grind the coffee, and blast
	out a cup just as you stumble into the kitchen.
	</p>

	<p>
	But that's not what I wanted.
	</p>

	<p>
	I asked her, "What's the most aggravating, erratic,
	expensive, complex, demanding but yet <i>ultimately gratifying</i>
	espresso machine?"
	</p>

	<p>
	She looked nervously both ways and asked quietly, "Do you
	have a girlfriend?"
	</p>

	<p>
	Then she lead me back to a dark and dusty corner
	of the shop. There before me was a chrome-plated prop from a '50s
	science fiction chemistry lab, festooned with pipes and knobs: 
	Just what I had in mind.
	</p>

	<p>
	<picture name="La Pavoni Europiccola" url="Photos/01-Pavoni.jpg"/>
	</p>

	<p>
	So I bought a La Pavoni manual-pull espresso machine and 
	a pile of books. 
	</p>

	<p>
	These are the notes I use to refresh my memory about 
	how to use the Pavoni Europiccola.  It is a wild
	beast (sometimes called the "Chrome Peacock.")
	But with patience and perseverance, it can make
	a superior drink.
	</p>
</s>
	
<s name="Books">

	<p>Chemistry and biology</p>

	<p style="margin-left: 4em">
	<cite
		name="Andrea Illy and Rinantonio Vani (editors)"
		title="Espresso Coffee"
		pub="Academic Press"
		date="1995" />
	</p>

	<p>	
	The book is a collection of articles by various authorities,
	including the great master, Ernesto Illy.  It covers the
	morphology of beans, extraction chemistry, and recommended
	parameters. It is weak on practical details.
	</p>
	
	<p style="margin-left: 4em">
	<cite
		name="Scott Rao"
		title="The Professional Barista's Handbook"
		pub="Scott Rao"
		date="1995" />
	</p>

	<p>
	This is an eminently practical guide to advanced methods,
	machine tuning and artistic technique. The book is privately
	published. You can read more about it and place and order on
	the author's
	<link 	name="website." 
		ref="Book"
	/>
	</p>
	
	<p>
	The excellent website 
	<link 
		name="Espresso Parts"
		ref="Parts"
	/>
	has a large selection of books and videos aimed at developing
	skills for professional barista competitions. The Scott Rao
	book cited above is the least expensive of the titles sold
	there. I expect I'll try one or more of these as my budget
	permits.
	</p>

	<p>
	A basic online coffee glosssary is published by
	<link name="The Coffee Geek" ref="Geek"/>
	</p>

	<p>
	If you live in a city big enough to have one or more
	high quality coffee shops, try by all means to visit
	and experience the product. There is no substitute for knowing
	what is possible and how it should taste. The widespread
	availablity of espresso made by disaffected teenagers has
	done much to debase the public taste.
	</p>	
</s>

<s name="Machine">

	<p>
	I've been using a slightly modified Pavonni Europiccola.
	I added the pressure gauge from the "Professional" model.
	</p>
	
	<p>
	The Europiccola is a small machine that can only make two or three
	shots at at time. The large "Professional" model has a larger
	boiler, but does not allow controlling the temperature setpoint.
	</p>

	<p>
	If you are truly hard-core, I should add that both of these
	machines are strictly consumer-grade. Pavoni does make commercial
	espresso machines, but as far as I know, they are all automatic.
	</p>

</s>

<s name="Reference parameters">

	<p>
	This table summarizes recommendations from the Illy book for
	a standard double pull:
	</p>
	
	<table>
	<tr><th>Coffee</th><td>13-14 grams</td></tr>
	<tr><th>Water</th><td>2 - 2.5 oz</td></tr>
	<tr><th>Water temp</th><td>90.0 (+-5) degrees C (194F +-9)</td></tr>
	<tr><th>Infusion time</th><td>30.0 (+-5) seconds</td></tr>
	<tr><th>Infusion pressure</th><td>9.0 (+-2) bar</td></tr>
	</table>
			
	<p>
	The +- ranges are where the art of the barista comes in.
	Different coffees, different roasts, and personal artistic
	interpretation all play a role.
	</p>
	
</s>
		
<s name="Using pressure to measure temperature">

	<p>
	The Pavoni gauge reads pressure in bars. It is only
	used to determine the temperature. The infusion pressure is
	determined by your arm.
	</p>

	<table>
	<th>At 90C, the equilibrium vapor pressure of water is 0.7 bar.</th>
	</table>
	
	<p>
	If you want to fuss with other water temperatures, there is a 
	somewhat tedious, but accurate, formula for finding the 
	pressure: the Goff-Gratch equation:
	</p>
	
	<p>
  	Let <i>t</i> be the temperature in degrees C:
  	</p>
  	
  	<code><![CDATA[
	T  := t + 273.15
	k  := 373.16/T
	a1 :=  7.90298 * (1.0 - k)
	a2 :=  5.02808 * log10(k)
	a3 :=  1.3816e-7 * (1.0 - 10.0^(11.34400 * (1.0-k)))
	a4 := -8.1328e-3 * (1.0 - 10.0^( 3.49149 * (1.0-k)))
	a5 := log10(1013.245)
	s  := a1 + a2 + a3 + a4 + a5
	pressure := (10.0^s)/1000.0 ]]></code>

	<p>The pressure comes out in bars.</p>
</s>


<s name="Milk">

	<p>
	I like to use whole milk, but 2% also works well.
	</p>
	
	<p>
	The secret of getting lots of firm froth is using
	the freshest obtainable product.
	Trying to froth milk is a good test of freshness.
	</p>
	
	<p>
	Buy from a quality high-volume store and check the
	dates on the cartons at the back of the shelf.
	</p>

<ss name="Organic milk">

	<p>
	None of the organic co-op milk brands I've tried have
	worked well. It is possible that they are stale or have
	other handling that keeps them from frothing well. 
	</p>
	
	<p>
	In support of the staleness theory, I've found that 
	local organic brands sour in the carton much faster
	that regular grocery store brands. I don't think
	preservatives are allowed in any sort of commercial
	milk, so that only seems to leave the time spent
	in shipment and storage on the shelf.
	</p>

	<p>
	In my area, the best milk I've found is from a
	high-volume high-cost grocery store chain. It happens
	to be organic, but I've also found that their regular
	milk works equally well. From this, I think the most
	likely variable is storage and shipment time before sale.
	</p>	
</ss>

<ss name="Milk preparation">
	
	<p>
	Use stainless steel pitcher that has room for the
	milk to double in size. If you are making latte 
	with double-pulls, measure out two regular coffee
	mugs filled 3/4 full. (Two of these are the limit
	for the Europiccola.)
	</p>
	
	<p>
	<picture name="Measuring milk" url="Photos/02-MeasuringMilk.jpg"/>
	</p>

	<p>	
	Put the pitcher in the freezer so it has time to chill
	while you complete the other steps.
	</p>

	<p>
	<picture name="Chilling milk" url="Photos/03-MilkChilling.jpg"/>
	</p>

</ss>
</s>

<s name="Cups">

	<p>
	You will need two coffee mugs for latte and 2
	smaller cups to catch the pulls.
	</p>
	
	<p>
	I fill my cups with hot water from the tap and
	stick them in the microwave for 1 minute. 
	</p>
	
	<p>
	<picture name="Cup warming" url="Photos/04-CupWarming.jpg"/>
	</p>

	<p>
	DO NOT repeat the microwave cycle: you can create
	superheated water that will blow you up when the
	cup is touched. 
	</p>
</s>
	

<s name="Coffee">

	<p>
	The received view is that <i>Coffea Arabica</i> makes	
	the best espresso and most of the more "technical"
	coffee brands like to state on the package
	"100% Arabica"
	</p>

	<p>
	Regular grocery store coffee is a terrible choice.
	It has too high a percentage of robusto beans, which
	after extraction often have an aftertaste like burnt rubber.
	</p>
	
	<p>
	Freshly ground or not, grocery store beans have usually
	been on the shelf for weeks after roasting. This is hopeless.
	</p>

	<ss name="Storing your coffee">

	<p>
	It is better if you don't.
	If at all possible buy small quantities from the
	roasting shop and grind it immediately before use.
	</p>
	
	<p>
	If you must store ground coffee, keep only small amounts
	in a sealed container. I will confess that I often store
	a three day supply. It is not optimum, but life is short
	and mess is long.
	</p>
	
	<p>	
	Storage should be cool, dry, and dark with no air. 
	Some people store ground coffee or beans in the freezer, but 
	I've had nothing but weird results from that practice.
	I'm not sure if it's the freezing or thawing that causes
	damage, but I don't like the taste of the result.
	Using the refrigerator was a disaster: coffee is a
	magnet for food odors.
	</p>
	</ss>
		
	<ss name="Roast">
	
	<p>
	I prefer to avoid "Espresso roast", "French roast", "Vienna roast",
	and "Full city roast": These terms are used in a highly inconsistent
	manner but often refer to beans that are burnt beyond recognition.
	If you can find a local shop that roasts fresh beans at least weekly,
	try one of their medium roast arabica blends and adjust to suit your
	preferences.
	</p>
	
	<p>
	A great many coffee house chain store beans I've tried
	suffer from over roasting. It hides many little coffee faults 
	with one great big one.
	</p>

	<p>
	Where I live, the grocery store and food co-op substances labeled
	"Espresso" and sold out of tall plexiglass cylinders 
	share a common characteristic: they are over-roasted
	and full of peroxidized oils from long-term storage. You'd need 
	to be an old school organic chemist to identify the strange tastes 
	evident in straight pulls from these products. The petro chemical 
	industry might be interested.
	</p>
	
	<p>
	Try to locate a roasting shop that does a high
	volume of business because this helps insure you're
	getting reasonably fresh beans. Ask them how many
	sacks of beans they go through a week.
	</p>
	</ss>
		
	<ss name="Grind">
	
	<p>
	Whirling propeller grinders give really terrible results
	because the grain size is not uniform. 
	</p>
	
	<p>
	If you don't have a good burr grinder, it is better
	to buy pre-ground or grind it in the store (in small
	quantities.) Most commercial grinders in stores do a
	pretty good job of getting uniform grain size, but the
	grains run a bit large even on the fine setting. I think
	this is due to the fact that the burrs are seldom cleaned
	and sharpened or replaced.
	</p>
	
	<p>
	The appropriate grind depends on the roast as well.
	For me, darker roasts need slightly coarser grinds.
	They also tend to be oily and rapidly gum up the burrs.
	(You really must take apart your grinder and clean the
	burrs from time to time.)
	The pull tells all: If it requires pressure in
	excess of 23 lbs to complete the pull in 25 seconds,
	the grind is probably too fine or the tamp is too firm.
	</p>
	
	</ss>

	<ss name="A dodge for beginners">
	<p>
	Illy pre-ground espresso tastes pretty good to me. I've
	found I have to tamp extra hard because the grind is a
	little too coarse for my regular technique. But it's
	good enough to give the beginner a good idea of what
	the result should be. Using a reliable product 
	eliminates several variables that can othewise go wrong.
	</p>
	</ss>
</s>

<s name="Infusion pressure">
	<p>
	Tamping pressure and grind work together to develop
	the resistance to the pull. The goal is to subject
	the coffee to about 9 bars of pressure for 25 seconds.
	</p>

	<p>
	The Pavoni level gives about 10:1 mechanical advantage.
	The piston is about 1.5 square inches. Nine bar is
	130psi, so dividing by the area:
	</p>

	<code><![CDATA[
		area = (pi * (1.5/2)^2)]]> = 1.77 in^2</code>

	<p>
	The force at the piston needs to be: 1.77 * 130 = 230 lbs,
	or 23 lbs at the lever.
	</p>

	<p>
	When you're working out a new type of coffee, it is
	best to keep the 23 lbs of force and adjust the
	grind so this force takes 25 seconds to complete
	the pull.
	</p>

	<p>
	If you're using pre-ground coffee, your only control
	is the tamp. In that case, you have to adjust the 
	tamping force to try and get the same result.
	</p>
</s>

<s name="Grooming">

	<p>
	Overfill the portafilter without pressing down at all.
	If you're using prepared coffee, just take a dip from
	the can.
	</p>

	<p>
	Hold the filter loosely in one hand and tap on the side
	with the back of a knife held in the other hand. The
	coffee will spill over (use a plate) and settle into
	the filter. Carry on tapping for about 10 seconds while
	rotating the filter.
	You want to end up with just a little to
	level off with the knife. The tapping integrates the
	grains and helps prevent blow-outs.
	</p>
	
	<p>
	<picture name="Before tamping" url="Photos/05-BeforeTamp.jpg"/>
	</p>
</s>

<s name="Tamping">

	<p>
	The biggest pitfall here is not having a tamper that
	fits. The one that comes with the Pavoni is a ridiculous
	plastic toy with domed ends that are too small to fit
	the filters. I bought several and none had the close
	fit I wanted. Finally, I bought an oversized tamper
	made from an aluminum casting and turned it up on a
	metal lathe so it fits my filters perfectly. I know
	this sounds like a big fuss, but it really makes a
	difference.
	</p>

	<p>
	I tamp in two phases: First I fit the tamper into
	the filter and press down with my fingers around
	the edge holding the whole thing up where I can
	see that the tamper is level with the top of the
	filter.
	</p>

	<p>
	Next, put the filter down on the table and tamp
	with considerable force, around 40lbs of pressure.
	I finish with a twist to polish off the top at a
	reduced pressure.
	</p>
	
	<p>
	If all is well, the coffee should be perfectly smooth
	and level about 3 mm below the top of the filter.
	</p>

	<p>
	<picture name="After tamping" url="Photos/06-AfterTamp.jpg"/>
	</p>

	<p>	
	If you put in too much coffee, you won't be able to 
	mount the filter so dump it out and start over.
	If it's too low, your coffee will be weak and
	the flow may not be restricted enough to give
	the right infusion time. You might also get a
	blowout where the water drill a channel through
	the cake.
	</p>

	<p>
	The perfect amount is such that when you tighten
	the filter into the head, the surface of the coffee
	rises just enough to reach the bottom of the head
	filter without rubbing. (If it does rub, you are
	likely to distrupt the dry coffee enough to make
	a crack.)
	</p>

</s>

<s name="Doing the deed">
	
<ss name="Prepare the machine">

	<p>
	Dump old water.
	</p>
	
	<p>
	Add fresh carbon-filtered water to just over 3/4 full
	on the sight glass.
	</p>

	<p>
	Turn on both switches and open the steam wand valve.
	When you get steam (not just air) from the wand, 
	close the valve. When you have about 0.5 bar pressure,
	run a pull through an empty filter to head up the 
	head. 
	</p>

</ss>
	
<ss name="Heating the water">

	<p>
	At the moment you start the pull, the water in the
	the head should be at 90C.  The water in the boiler
	is at 90C when the gauge reads 0.7 bar, but the 
	water temperature in the head will be much cooler
	when you raise the lever the first time.
	On the first pull, I let the gauge reach 0.9 bar.
	Between sucessive pulls, I cool the boiler down by
	turning off the switch for a few seconds.
	For the second pull, 0.8 bar is about right. 
	On the 4th pull, the gauge should read
	read about 0.7 bar. By that time, the head is hot enough 
	to keep the water at 90C. (And you are out of water!)
	</p>

	<p>
	The water temperature is determined by the pressure
	as long as conditions are stable. After bleeding
	off pressure or adjusting the power level switch,
	you need to wait for the gauge pressure to rise
	to the setpoint.
	</p>

	<p>
	<picture name="Correct pressure for 3rd pull - 0.75 Bar" 
		url="Photos/07-CorrectPressure.jpg"/>
	</p>
	
</ss>

<ss name="Preheating the head">
	<p>
	Before the first shot, I run 2 or 3 short pulls
	though the head. I lock on an empty filter to give
	a little back pressure. This also insures that the
	head is quite clean from the last user.
	</p>
</ss>

<ss name="Mounting the filter">
	<p>
	Remove the empty filter and dry the bottom surface
	of the head with a towel. Drips can initiate craters
	that will blow through.
	</p>

	<p>
	I like to raise the handle with the filter loosely
	attached. This lets air fill the cylinder without
	being pulled back up through the coffee, which could
	put a crack in the cake. 
	</p>

	<p>
	Mount the filter in the handle and lock it onto
	head only enough so it doesn't fall out. At the
	same time, put your preheated catch cup under
	the head.
	</p>

	<p>
	Next,
	raise the handle about 10 degress above level.
	You want to go as high as possible without releasing
	water. Unfortunately, the only way to learn about
	this angle is to scald yourself a few times. If
	you do release water with the handle unlocked,
	the pull will be ruined. Actually, there is no
	need to scald yourself: 10 degrees is enough to
	insure that you won't pull a vacuum on the
	coffee.
	</p>

	<p>
	With the handle held up at this intermediate
	position, lock the filter all the way. Then	
	raise the handle slowly to the top.
	</p>
</ss>

<ss name="Preinfusion">
	<p>
	Preinfusing is the introduction of hot water
	into the coffee at reduced pressure. The idea is
	to wet the coffee so it expands in the filter
	without pushing water all the way through.
	The coffee will then provide enough resistance 
	when you do the pull.
	</p>

	<p>
	As soon as you have raised the handle all the way,
	count off about 3 seconds and press down gently.
	Just a little more force than the weight of your arm.
	The head may not have had time to fill with water,
	so the lever may feel "spongey." Proceed to push
	down gently until you feel just a bit more resistance.
	Now wait and watch your catch cup. When drips of 
	coffee begin to fall, release the pressure and
	raise the lever back up to the top. Now wait
	for 10 seconds.
	</p>
 
</ss>

<ss name="Pulling the shot">
	
	<p>
	<picture name="Ready to mount" url="Photos/08-ReadyToLoad.jpg"/>
	</p>
	
	<p>	
	Press down with about 20-30lbs of force. I pull up on
	the filter basket handle to take some strain off the
	head joint. It should take between 2 and 30 seconds 
	to complete the pull. If you have to press harder or 
	the pull ends up taking longer (or gets stuck!) you 
	probably have too fine a grind.
	Make adjustments next time.
	</p>

	<p>
	You might also get a blow-out. In this case, the handle
	will go down too fast. The stream coming out of the filter
	will be very light colored "blond" and thee coffee will
	be undrinkable. If this occurs, dump it and start again.
	</p>
	
	<p>
	Watch the stream for color. It should be dark brown with
	a few lighter streaks. It may occasionally "glop" out
	looking like honey being poured. All is well as long
	as the color remains dark. At some point, you may 
	see larger bubbles and a much lighter color. If that
	occurs, stop the pull at once and withdraw the cup.
	</p>

	<p>
	When/if you get the lever all the way down, don't
	wait for the dregs! In fact, some artists like
	to stop just over half way down, using only the first 
	part of the pull. This is called a "ristretto" and makes 
	very good tasting coffee.
	</p>
	
	<p>
	Don't try to release the handle immediately. It will 
	blow you up! Wait for about 20 seconds and partially
	release the filter, pressing down a bit on the handle
	to let off pressure. When don't hear any more hissing
	from the escaped steam, you can remove the filter.
	I still bungle this from time to time. It makes
	a colossal mess if you release the filter under
	pressure.
	</p>
	
	<p>
	<picture name="After the pull" url="Photos/09-AfterPressing.jpg"/>
	</p>

	<p>
	Take a sip: If it's sour-tasting, you have gone wrong
	somewhere, probably on the cool side or possibly because
	a channel formed in the cake. Too long a pull usually
	at too high a pressure and temperature extracts badness i
	from the coffee.
	In that case you will notice organic chemical lab smells
	and tastes. The crema will be broken up on the surface
	of the coffee with fractal-looking borders.
	</p>

</ss>
	
<ss name="Frothing the milk">

	<p>
	Some say this is anathema, but I prefer to steam the
	milk last when making lattes because the machine needs
	to be roaring hot.
	You also have more steamng capacity after the pulls are
	completed because the element is heating a smaller volume
	of water..
	Finally, a latte has so much milk that it pretty much
	obscures any slight ill effects from the coffee sitting around
	a few minutes longer.
	</p>
	
	<p>
	You must have a dip thermometer that features "quick
	reading." You can buy specialized versions that clip onto
	the side of your steel pitcher.
	</p>

	<p>
	Another key factor is the pitcher size: The one 
	illustrated is just right for two regular coffee
	mugs 3/4 full of milk. It is about half full before
	steaming and ends up full to the brim with froth.
	The milk itself is infused with micro-bubbles and
	has a thick texture when poured.
	</p>
	
	<p>
	<picture name="Ready to froth" url="Photos/10-ReadyToFroth.jpg"/>
	</p>

	<p>	
	Heat the machine up to full blast.
	It will be less than half full after completing two
	pulls.
	</p>

	<p>	
	<picture name="High pressure" url="Photos/11-HighPressure.jpg"/>
	</p>

	<p>	
	Bleed off some steam at the wand to clean
	out condensation and possible crap.
	</p>

	<p>
	Dip the wand just below the surface of the milk and
	open the valve all the way. I keep the wand near
	the edge of the pitch and tilted slightly to make
	the milk swirl around.
	</p>
	
	<p>	
	You want the steam to draw the milk down with the jet,
	whipping it up into a froth in the process. If the
	wand is too high, you will blast milk all over the
	place. If the wand is too low, the milk will get too
	hot before much froth is generated. It takes just a
	little practice to get this right. As you proceed,
	you will have to lower the pitcher because the frothed
	milk has more volume. Continue this process until
	the thermometer reads 120F.
	</p>
	
	<p>
	Now we begin phase two: we want to head the mild
	and refine the froth. To do this, lower the wand
	until you hear a much louder roaring. Then back away
	until it just begins to quiet down.
	Raise and lower the pitcher slightly but constantly
	to adjust the action so you are right at the boundary
	where the sound changes. (Like the way you dither the
	steering wheel when driving.) Continue this phase
	until the thermometer reads 155F. 
	</p>
	
	<p>
	Don't overheat! When it gets to about 150, get ready
	to shut off the steam. At 153, start cranking the valve.
	You have keep the wand in position until it's shut off,
	so it will go the rest of the way to 155F before you
	can get the valve shut off completely.
	</p>

	<ss name="Milk frothing attachment">
	<p>
	Pavoni offers a gadget to help you make better froth.
	I've tried this a few times and I found that it was
	not as effective as careful work with the wand and fresh
	milk.
	</p>

	<p>
	<picture name="Milk frothing attachment" url="Photos/MilkFrother.jpg"/>
	</p>

	<p>
	The Pavoni frother is nonetheless useful: Most kitchens
	have inaccessible areas. Below the sink, corners of the
	ceiling, backs of seldom-used drawers, etc. If you find that
	any of these areas in your kitchen are not coated with
	scalded milk, you may want to give the frothing attachment
	a try.
	</p>
	</ss>

</ss>

<ss name="Finishing">

	<p>
	Pour off equal measures of liquid milk into each mug.
	I use the side of a kitchen knife to hold back the froth.
	The mug should filled only 2/3 full to leave room for the
	coffee and frothy topping.
	</p>

	<p>
	Spoon out the froth to make a head on each cup.
	</p>
	
	<p>
	Finally, dump in the coffen from the catch cups.
	You can finishing by pouring a fine stream into 
	the froth to form decorations: the inverse of a 
	traditional espresso drink where the froth is 
	used to decorate the coffee.
	</p>

	<p>
	Part of the enjoyment of a latte is the 
	thrill of transgression: Perhaps not as 
	effective as a nose ring or tattoo, but
	you are drinking a mild-flavored brew that 
	most espresso culturatti disdain. Might as
	well put some jam on that croissant too. 
	</p>

	<p>
	<picture name="Satisfaction" url="Photos/12-Result.jpg"/>
	</p>
</ss>
</s>

<references name="References">
	<def 	name="La Pavoni - The source"
		url="http://www.lapavoni.com"/>
	<def 	name="Kazys Varnelis - Lair of the Chrome Peacock"
		url="http://pavoni.varnelis.net"/>
	<def	name="Daniel Ho - How to use a La Pavoni"
		url="http://www.gurus.net/pavoni"/>
	<def	name="Home Barista - Excellent. Check out the FAQ."
		url="http://www.home-barista.com"/>
	<def	name="Dave Bayer - Resources for home espresso"
		url="http://www.math.columbia.edu/~bayer/coffee.html"/>
	<def	name="The Coffee Geek - An Espresso Glossary"
		ref="Geek"
		url="http://www.coffeegeek.com/opinions/markprince/07-20-2004"/>
	<def	name="Stefano's Espresso Care (Has Pavoni parts and diagrams)"
		url="http://espressocare.com"/>
	<def	name="Espresso Parts"
		url="http://www.espressoparts.com"
		ref="Parts"/>
	<def	name="Pavoni Express"
		url="http://www.pavoniexpress.com"/>
	<def 	name="The Professional Barista's Handbook" 
		url="http://www.professionalbaristashandbook.com"
		ref="Book"/>
	<def	name="Parts Guru - Parts for Pavoni at reasonable prices" 
		url="https://shop.partsguru.com"
		ref="Parts"/>
	<def	name="Paradise Roasters - Very fresh roasted coffee"
		url="http://www.paradiseroasters.com" />
</references>

</page>

