Early 20th century magnifying glass with its own 3 legged stand - probably for carrying in the field for map reading or the examination of specimens perhaps. The glass screws up and down in its housin

 

0 false 18 pt 18 pt 0 0 false false false This scientific/medical-magnifying instrument was made in France for the Clay Adams Co. founded in 1916. It appears that it was made to be strapped onto the h

 

Slide rule c 1959 belonged to former Congressman Bob Filner who started college as an engineering student before switching majors and obtaining his PhD in history of science.

 

Looks to me like this is a pretty complete set the case is not in that great of shape but it holds all the pieces it is an elementary set it even has the lead holder with spare pencil lead in it all p

 

Antique Mother of Pearl opera glasses, The binoculars are marked: LEMAIRE FI PARIS. Beautiful nice colorful iridescence in the Mother of Pearl. The top is marked: with a fly and they where made in Fra

 

Prepared by Herbert.W.H.Darlaston, this slide is hairs of a skunk, Mephiles mephilica. A professional slide prepare of some repute, slides by Darlaston are well sought after. Postage to UK is £4-00 ,

 

A unique kaleidoscope from Van Cort. The wooden egg shaped kaleidoscope is highly polished and 2" tall. It is in excellent used condition and sits on a 2" tall brass stand. Thanks for looking!

 

Hope 740 custom circular slide rule made by Concise Co. of Japan and marketed under "Hope". This is an English-Metric converter, the front is a 3" pocket circular slide rule...attached to a rectangula

 

Brand new in the box

 

The title page reads in part : "A System of Geometry & Trigonometry together with a Treatise on Surveying; Teaching Various Ways of Taking the Survey of a Field; Also to Protract the Same & Fi