Sodium perborate is a white, granular solid which decomposes in an aqueous solution to hydrogen peroxide and sodium borate. Active oxygen content 10%. Melting point is 63 degrees Celsius. It's used in

 

Offered here is an original heavy brass cased ten cap hand blasting machine. Tag shows it to be manufactured by the Hercules Powder Company. Patent date of 1930 on case. This would have been used to s

 

Offered is a Pinkham & Smith porcelain thermometer. At the base of the thermometer is marked AMER. THER. CO. ST. LOUIS. The height is approximately 5 3/4. The face is porcelain, I am uncertain wha

 

VINTAGE K & E SLIDE RULE POLYPHASE NO. N4043-3 MADE IN USA GREAT CONDITION WITH CASE ORIGINAL BOX INCLUDED BOX TOP HAS SOME WRITING UNDER COVER NO BREAKS FUNCTIONS PERFECTLY LOW STARTING BID OF ON

 

YOU ARE LOOKING AT A VINTAGE MEDICAL MODEL OF THE L-SPINE HAND MADE BY SOMSO IN W.GERMANY . SOMSO IS ONE OF THE BEST COMPANYS IN MEDICAL MODELS BECAUSE OF THERE LIFE LIKE AND SIZE . THIS MODEL IS PERF

 

Here is a real nice piece of surveying history. In wooden box it weighs 17 pounds, will only be shipped expedited with tracking and fully insured. Looks to be in decent shape. Even has some tools with

 

jamesforbes Store This is a nice little collection of 4 vintage clear glass chemists bottles which all have their labels on.The tallest stands at approx 6 inches and the smallest approx 4 inches.They

 

Vintage Keuffel & Esser Drafting Kit Minusa Series "S" S795 1/2. Is missing one piece but has 3 extra pieces that are not of this set (Compass Germany). Case is in great shape for its age.

 

Vintage eye wash cups made of three different materials, aluminum, glass, plastic. Aluminum is 1 1/2" x 1" x 1". No mark. Paneled glass is 1 3/4" x 1 1/8" x 2 1/4". G mark on bottom. Plastic is 1 1/2"

 

first-s-mart store ANTIQUE GERMAN ORIGINAL RICHTER DRAWING DRAFTING RED BAKELITE HANDLE RULING PEN Ladies & Gentleman,Stunning and rare Antique German Original Richter engineering technical drawin