Calcium acetate monohydrate is a white powder with a slightly bitter taste and slight odor of acetic acid. Decomposes on heating forming acetone and calcium carbonate. Soluble in water and slightly so

 

Original Vernier Theodolite Elliot Brothers Original solid Brass Elliot Brothers Vernier Theodolite You now have the opportunity to own this very rare, very heavy perfect example of English precision

 

i000000 Vintage HELIX Brass Compass Drawing Instrument Click Images to Enlarge You are bidding on a nice example of Vintage HELIX Brass Pencil Compass Pictures tell the story - Helix name Ideal additi

 

Here is a vintage AUTO LITE brand miner's carbide light designed to be worn on a miner's hat/cap. This one has its original AUTO LITE 2 1/2" reflector and the soldered-on brace to hold the lamp steady

 

ANTIQUE T.R. JONES HARD BOILED LEATHER MINER'S HELMET T.R JONES CO. PAT. 4-15-24 COAL KING REG. TRADEMARK WILKES BARRE VERY NICE CONDITION! THIS WOULD MAKE AN EXCELLENT ADDITION TO YOUR COLLECTION Pow

 

Outside USA shipping please contact me first. COMBINE SHIPPING available Thank you. Flying Fish 1002 Used slightly Shanghai Slide Rule Factory 1960-1970 product. Scales: (Front) Sh2, Sh3, K, A [B, sin

 

This is for a nice old pair of Edwardian binoculars with an unusual red shagreen wrap on the barrels. They are brass with a black finish and the shagreen is vivid red. They extend in and out to focus

 

Vintage Keuffel & Esser Co. slide rule. Case and ruler show slight wear from use and age. There is a name written just on the inside flap of the case as shown in the pictures.

 

YOU ARE BIDDING ON A 31"THOMPSON GOLD CATCHING SLUICE BOX ITS MEASURES ARE 31" LONG AND 12" WIDE AT FLAIR OPENING AND 8"WIDE THE REST OF THE WAY THIS SLUICE BOX DOES HAVE SOME SCRATCHES AND DENTS SO I

 

Vintage / Antique Potentiometer by Leeds & Northrup Co. Medical Equipment I don't know how old this is but I think Circa 20's, nor do I know what it does. ((( For International Shipping Please Con