Sodium nitrite is a slightly yellowish to white solid. Soluble in water and slightly soluble in alcohols. Density is 2.1, with a melting point of 271 degrees Celsius. It's uses include-preservative in

 

This is the 21st Century Gold Pan. It is called "The Screw Pan." It is the only Concentrating wheel and Gold Pan combination in one. This pan also works in the desert----DRY. Very easy to operate. Hol

 

In decent shape, some old handwriting on the box itself. See pics for detail and feel free to message with questions. FREE SHIP!

 

A handmade vintage human eye prosthetic Size: medium. Color: Brown-green The picture show the item you get, but sometimes color and shape may look different from picture because your screen type, the

 

Up for bids A vintage Prak-T-Kal Automatic Vaporizer - Humidifier This is definitely something from days gone by since everything is plastic now. There is an aluminum resting pan as well as a top ring

 

This item has no wear on it, is in excellent condition. Fully functional.

 

Vintage Brass Kaleidoscope w/Box by Van Cort Instrument Makers This is a vintage brass kaleidoscope made by Van Cort Instrument Makers. Comes in original box. Measures approximately 9 1/2" long, 1 1/2

 

Antique LeMaire Paris Mother Of Pearl Opera Glasses Made In France This is a beautiful antique Mother of Pearl opera glasses made in France. Marked on the eye pieces Le Maire Paris and some of the let

 

You are bidding on 1 Dietzgen Alidade for use with a plane table. Instrument in very good condition. Case shows considerable use. Closing flap missing. Labled U.S. on instrument and case. Appears comp

 

Artery model demonstrating the four stages of atherosclerosis. Model shows four stages: Normal, Fatty Streak, Plaque and Stenosis. All stages rotate on a hinged pin. Product is new, unopened and in or