Here are several lab props. I think I have a mad scientist lab in my runtimes also. I'll try to track it down and see where I downloaded it.

Lab Equiupment
http://www.sagersweb.com/models.php

Lab Props
http://www.3dtrue.com/poser/17.html

Laboratory and Factory
http://lab108.x0.com/lab108/labandfac.html

Lab Coats
http://www.philc.net/freestuff_archive.htm

Lab Rat
http://www.3dup.com/highmodels/1024/0005.vfx

Trolley Cart
http://www.dfki.de/~kroener/raytrace.htm

Lab Tube
http://wg3d.com/downloadsx.html

Med Tube
http://www.freewebs.com/mapps/downloads7.htm

Stonemason
http://home.xtra.co.nz/hosts/polycount3d/Freestuff.htm

Dystopia Console Station
http://www.poseraddicts.com/index.php