Chapter 1 / Volume 2
http://blog.makezine.com/archive/2011/04/yale-student-killed-in-lathe-accident.html
http://www.mini-lathe.com/Mini_lathe/lathe_safety.htm
http://www.zeraware.com/
http://www.americanmachinetools.com/how_to_use_a_lathe.htm
http://www.fricknet.com/lp/safety_posters.php?gclid=CPTW6ZfFhaYCFQTNKgodFQoIpA
http://www.envirosafetyproducts.com/product/magnifying_safety_glasses_magnifying_safety_glass

Chapter 2
http://www.sherline.com/resource.html  (Accessories from other vendor, but Sherline)
www.lathecity.com/Tools/ (***)
www.omwmetal.com   (Radius cutter)

Chapter 3
http://littlemachineshop.com/Reference/CuttingSpeeds.php  (turning speeds etc.)
http://en.wikipedia.org/wiki/Speeds_and_feeds
http://www.sherline.com/latheins.htm
http://littlemachineshop.com/Reference/CuttingSpeeds.php

Chapter 4
http://www1.mscdirect.com/ (turning sets, cutting tools for benchtop systems)
http://shars.com
http://www.mcmaster.com

Chapter 6
http://www.kennametal.com/en-US/home.jhtml (chip breaker)
http://en.wikipedia.org/wiki/Aluminium_alloy (info about aluminum)
http://www.aluminum.org/
http://www.matweb.com/reference/aluminum.aspx
http://www.hmwire.com/aluminum_alloys.html
http://www.alfed.org.uk  (look for “Aluminum Federation”)

http://www.ecsceramics.com/cercoa/ceramics.html (Ceramics)
http://www.ceramics.net/standard/machinable_ceramics.html
http://www.astromet.com/macor.htm

http://www.caswellplating.com/buffs/feltbobs.htm (super finishing, for e.g. artwork projects)
http://www.calibrestonetools.com/
http://www.warmglass.com/glass_polishing.htm

http://www.jewelrysupply.com/   (Sterling Silver)
http://www.fdjtool.com/           
http://www.thunderbirdsupply.com/
http://www.aemetal.com.au/
http://www.firemountaingems.com/
http://en.wikipedia.org/wiki/American_wire_gauge  (wire gage to mm conversion table)

http://www.riogrande.com/Product/6-Sterling-Silver-Sheet-Dead-Soft/100109?pos=3 (Hardening Sterling Silver)
http://www.delphiglass.com/
http://www.riogrande.com 

Wire gauge http://www.dave-cushman.net/elect/wiregauge.html (***)
Sheet metal gauge http://en.wikipedia.org/wiki/Sheet_metal_gauge#Gauge (***)

http://www.onlinemetals.com/ (ledloy)
http://www.speedymetals.com/
http://www.metalsupermarkets.com/

http://www.astm.org/Standards/B861.htm  (Titanium alloys standards)
http://www.onlinemetals.com/titaniumguide.cfm   

http://MSCdirect.com  (Machinable wax)
http://www.machinablewax.com/
http://www.flexbar.com/
http://www.ajstoolsonline.com/mystore/

One of the exotic wook retailer asked us to remove the link to his shop since it would affect negatively his search engine ranking. ??? Whatever - we remove the link.
http://woodenpost.com/products/exotic_wood_turning_blanks.htm

For materials properties try:
http://www.matweb.com/index.aspx
http://en.wikipedia.org/wiki/Main_Page
http://www.onlinemetals.com/stainlessguide.cfm
http://www.onlinemetals.com/productguide.cfm

Looking for advice in machining unusual materials? Try out e.g.:
http://www.cnczone.com/forums/general_metalwork_discussion/

More vendor addresses (***)
        Metals:
http://www.metalsdepot.com/
http://www.onlinemetals.com/
http://www.smallparts.com/
http://www.industrialmetalsales.com/
http://www.mcmaster.com/
http://sherline.com/online.htm 
Purchasing plastics is more difficult. Perhaps try out the following sources:
www.online.metals.com 
www.eplastics.com
For machinable wax, try this:
http://MSCdirect.com 
http://www.machinablewax.com/
http://www.flexbar.com/

http://www.yahoo.com/  (Search engines)
http://www.google.com/
http://en.wikipedia.org/wiki/List_of_search_engines (***)

Chapter 7
http://www.woodturners.org/tech_tips/morse_taper_sizes.htm  (Morse taper)
http://www.beautifuliron.com/mttaper.htm
http://en.wikipedia.org/wiki/Morse_taper#Morse
http://www.tools-n-gizmos.com/specs/Tapers.html
http://www.machinist-guide.com/morse_taper_dimensions.html
http://www.littlemachineshop.com/Reference/Tapers.php
LatheCity.com will soon offer a LASER protractor for cutting Morse adapters, stop by again.
http://tool20895.homestead.com/files/MORSE1.htm  
http://www.projectsinmetal.com/shop-tip-how-to-cut-a-morse-taper-the-easy-way/
http://www.woodturner.org/community/youth/projects/MorseTaper_1.pdf
http://www.youtube.com/watch?v=363ayj7QKTE

http://www.eisc.com/morse/reamers/1636.html (Reamer for cutting Morse arbors)
http://www.discount-tools.com/lav-551.cfm
http://www.eastonsupply.com/morsetaperreamers.aspx
http://www.mcmaster.com/#reamers/=biba81

Chapter 8
http://homepage3.nifty.com/amigos/radius_cutting_attachment/radius_cutting_tool-e.htm (radius cutter)
http://www.majosoft.com/metalworking/html/lathe_radius_maker.html
http://www.alaskatelecommunications.com/radius.html
http://www.metalwebnews.com/howto/turning-tool/spherical_turning_tool.pdf
http://bedair.org/Ball/ball.html
http://proxxon.com/us/
www.omwmetal.com
Gyroscope clubs:
http://www.gyroscopes.org/index.asp
http://www.topmuseum.org/index.html
How they work:
http://en.wikipedia.org/wiki/Gyroscope
Commercial sites:
http://www.gyroscope.com/about.asp
http://www.scientificsonline.com/

Chapter 10
http://www.mcmaster.com/#pitch-gauges/=ck6f32 
http://www1.mscdirect.com/ 

http://www.e-taps.com/index.htm (Custom taps)
http://www.westerntap.com/
http://www.regalcuttingtools.com/special_taps.html

http://en.wikipedia.org/wiki/Screw_thread (Double start screws)
http://www.practicalmachinist.com/vb/general-archive/multiple-start-threads-78699/
http://www.cnczone.com/forums/general_metalwork_discussion/17332how_cut_double_lead_thread.html

A tap and drill size calculator can be found at, e.g., http://www.newmantools.com/tapdrill.htm (***)
For a drill and tap size chart try out, e.g., http://en.wikipedia.org/wiki/Drill_and_tap_size_chart).

http://wiki.answers.com/Q/What_is_the_worlds_largest_bolt, the largest bolt ever made

Chapter 11
http://www.Sherline.com/grinding.htm (grinding lathe turning tools)
http://www.mini-lathe.com/Mini_lathe/Tool_grinding/tool_grinding.htm (a nice outline)
http://www.essortment.com/home/grindinglathet_slmz.htm   
http://www.steves-workshop.co.uk/tips/toolgrinding/toolgrinding.htm (a nice outline)

Special polishing machinery
http://www.caswellplating.com/buffs/feltbobs.htm
http://www.warmglass.com/glass_polishing.htm
http://www.calibrestonetools.com/

http://www.grindwellnorton.co.in/GrindingTech/pdfs/FactorsAffectSelection.pdf (Grinding wheels etc)
http://andre.com.pl/Portals/2/karty_pdf/aaa_zasadydoboru.pdf

http://microformtools.com/product.html (Form tools)
http://www.precisioncuttingtools.co.uk/special.html

Chapter 12
http://www.youtube.com/watch?v=lcGHtI9Lql4 (CNC)
http://www.youtube.com/watch?v=3kajCOxdww0