Oodles of research!

Well well well, look at what we have here! All of the following websites are resources for Lead Paint Poisoning, Pigments, Egg Tempera, and Oil Painting.

http://www.renaissanceconnection.org/lesson_art_oil.html
Describes how egg tempera became obsolete as oil grew in popularity during the Renaissance.

http://www.eggtempera.com/history.html
Gives some basic information about egg tempera's history.

http://education.sdsc.edu/index.php?module=ContentExpress&func=display&ceid=43
Great resource that describes the process of creating paint. Very descriptive and easy to understand!

http://www.weitzlux.com/leadpaintlawyer/lawsuit/poision/truefalsequestions_4657.html
This website is a lawyer site that gives information on lead paint.

http://www.lockport-ny.com/Allegheny/lead.htm
Supplied information on lead paint in general. What exactly it produces in terms of pigments and health hazards.

http://www.cpsc.gov/CPSCPUB/PUBS/5054.html
Provided a lot of information about the effects of lead poisoning, what to do about it, how to prevent it. That sort of thing.

http://www.epa.gov/lead/
This is the EPA website which gave a very good overview of lead poisoning. Had statistics as well.

http://www.sewanee.edu/Chem/Chem&Art/Detail_Pages/Pigments/Chromium_Oxide
Had information on egg tempera and other art techniques as well including oils and watercolors.

http://char.txa.cornell.edu/media/painting/oilpaint/oilpaint.htm
Gave info about oil history and some of its characteristics.