The powder is made of two components: a relative coarse carrier material and a superfine developing resin-powdered asphaltum or synthetic resins having low melting points. Credit: Popular Science ...

When the speedway was first born, the track’s original surface was created from “a sticky amalgam of gravel, limestone, tar, and 220,000 gallons of asphaltum oil,” according to sources. This turned ...

Cylindrical, flat-top, japanned canister with scrolled hasp lock on front, wire ring handle at top center, and one hinge at back. A faint gilt band encircles the overhanging, folded-edge top of lid; ...

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