This is a very old mathematical engineering instrument used for compensating polar planimeters, radial planimeters, square root planimeters, mechanical integrators, and suspended pantographs. It would

 

This Microscope Accessory (which I believe to be by Beck) comprises three retarding selenite discs fitted to rotating cells on three arms which, when in use, forms part of the substage assembly of sui

 

Description Welcome & Thank You for Shopping In the USA! A great original Treasury Department issued order form for Opium, Coca Leaves, or Compounds, Manufactures, Salts, Derivatives or Preparatio

 

thehoarder Store FINE ANTIQUE BRASS & CROCODILE LEATHER TELESCOPE 1900 binoculars This is a fine ANTIQUE BRASS & CROCODILE LEATHERTELESCOPEIn my estimation it dates from around the late 19th C

 

11" Tall Dakota Style Candy Pharmacy Drug Store Apothecary Store Jar display Click to View Image Album Click to View Image Album Click to View Image Album 11" tall store jar with NO cracks/chips/repai

 

c. 19th SWIFT HORIZONTAL MICROSCOPE (c.1900) English Old horizontal microscope made in the end of the 19th Century or the beginning of the 20th by J. Swift & Son. I have no idea what it was used f

 

Antique / Vintage K&E Co. Germany Steel Eraser used to erase pen and ink back in the day. Commonly mistaken for fleams or scalpels. Celluloid handle dates to 1910-1920. Very good condition. Measur

 

W.D. Byron oak tanned leather doctors bag. Great condition. Brand New.

 

I have owned microscopes and telescopes but this lens is very puzzling. It comes apart into 4 pieces, and there is a square piece of glass among the internal parts, very odd, sort of attached to a pie

 

Functions as Height and Weather Indicator. aka, a altimeter and barometer . Works great! Made in England.