e first small ruby, or nucleus, was placed in a hopper, and each blow causes a little of the powder to part of the company with an elaborate power plant at platinum crucible, which was fixed at the center of a sift through the gauze bottom. its disposal, and the vehicles themselves are so simple… … The "scientific" rubies have suffered a similar de- tend to ten or twelve blow- Fig. 3.—A special form of tower fbr repairing trolley wires. preciation. These gems first appeared in commerce in pipes. Pear-shaped rubies 1901. They were made, and are still made by Paquier, weighing 80 carats can be…
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