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

 

Another very high quality product from the family run firm of clock and barometer restorers at the:"Honiton Clock Clinic" in Devon.Oak Barometer CaseRope Style Carving Overall case diameter = 8" (22 c

 

Here is a very nice vintage German made drafting set. It is complete, and has spare tips, and leads. No rust, the felt and the case is is great. Shipped via USPS Priority Mail. This will make a fine a

 

Antique Microscope Camera Lucida. To fit tube/eyepiece size 27.2mm. See images for condition: Excellent. Optically and mechanically fine. This actually works incredibly well, compared to many others I

 

Normal 0 false false false EN-US ZH-CN X-NONE MicrosoftInternetExplorer4 Normal 0 false false false EN-US ZH-CN X-NONE MicrosoftInternetExplorer4 Vintage Keuffel & Esser Surveying Pole. Frisco mod

 

AllentownJim Store 1967 Pickett Fisher Controls Universal Valve Sizing Rule side Rule w case manual. Please see photos.

 

You are bidding on an awesome lot of 35 twist Lipitor/Caduet Black Ball Point pens. They have a nice heavy feel to them and write smoothly. These are the jewel-tip ones. They look like they have a lit

 

Item Description: VINTAGE JUSTRITE BRASS CARBIDE MINERS LAMP Vintage complete justrite brass carbide miners lamp. Top stamped MADE IN USA PAT NO 115123 JUSTRITE ON OFF. Bottom of lamp stamped UNITED S

 

Here are 45 boxes with 12 Speedball Pen Nibs in each box...never used. I've been advised they're from the 1950's and they are made by Hunt Pen Co. They are Triple Reservoir and of multiple tip sizes f

 

Vintage Medical Equipment - LOT #4- Penlong Laryngoscope with Penlon 3 Harris-Lake Blade- Foregger Folding Scope Laryngoscope with Sun-Med Extender and Foregger 4 Guedel Blade- Penlon 4 Macintosh Blad