Laboratory/science equipment

1 1/2" wide, 2" tall By Fred Cobbs

1 3/4" tall Produces high voltage electricity By Fred Cobbs

2" wide, 7/8" deep,  1 3/8" tall "A detector for early radio receivers (early 1900's). Used in electromagnetic wireless telegraphy (Wikipedia)". By Fred Cobbs

2" wide 1 1/2" tall Demonstrated that electricity traveled at the speed of light and was a wave.  The waves could be reflected, refracted and polarized, the same as light waves (very simplified) By Fred Cobbs

5 1/4" tall

2 1/8" x 3 1/4"

1 1/4" wide  x  1 1/2" tall By L. Delaney

Tubes are removable Rack is 7/8" wide For additional test tubes order # mat7a

Doesn't turn 3" wide, 3 1/2" tall By Mike Barbour

3/4" tall

78" wide

December birthstone. 3/4" wide, 1" tall

Laser cut in the USA and assembled by Wendy. 2" wide.

Wood  2" long