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

 

bidoff10 Store DescriptionNOTE: please scroll down to bottom of page to view all pics. You are bidding on a vintage barometer that measures 7" wide (wood). Just found a whole collection of these in an

 

This auction is for a Vintage Pharmaceutical Clock measuring 6" wide by 4 1/2" high in working condition. The heavy metal housing has embossed Medical Symbols around the clock face and the numerals on

 

Here on offer is a good antique collection of apothecary or jewellers weights. The weights are all pressed in brass and have age related patination and some tarnish. There are 4 drachms weights, 2 scr

 

10 karat gold round pin with a cross and flowers in the center and "Caritas Scientia" , and around this "Saint Joseph's Hospital School of Nursing Lancaster". The pin weighs 3.3 pennyweights, and meas

 

VINTAGE WOODEN DRAFTSMAN SLIDE RULE AND INSTRUCTION BOOK THIS WOODEN DRAFTSMAN SLIDE RULE IS IN GOOD CONDITIONTHE GIDE BOOK IS THE 1949 EDITION PLEASE SEE MY OTHER ITEMS

 

You are bidding on a VINTAGE Aqua Survey & Instrument Co magnetic locator! This locator measures approx 3 1/2" x 3 1/2" x 2 1/2", and has a patent number of 2775736. Comes with leather carrying ca

 

ESTATE SALE FIND: Vintage Bunsen Burner. No cracks in glass, Metal parts slight tarnish Chain not attached to snuffer, snuffer very tight, I have not tried to remove it or clean metal. No wick. Glass

 

VINTAGE VME NITRO BLASTING MACHINE I CAN NOT TEST THIS , IT PROBABLY NEEDS NEW BATTERIES , CHECK OUT MY OTHER BLASTING MACHINES THIS WEEK Please ask any questions prior to bidding. I will combine ship

 

YOUR BIDDING ON A HANKSCRAT AUTOMATIC ELECTRIC STEAM VAPORIZER-HUMIDIFIER. MODEL NO. 202B 120 VOLT PAT NO 2347825 REEDSBURG WISCONSIN USA. THE WATER SITS IN A PLASTIC BASE WITH FILL LINE STICKER. THE