New York, N.Y. : Scientific American Pub. Co. · leaf 566
under the auspices of of course, but essentially the same in principle, i.e., a coating the Bureau of Fisheries, has been the notable discovery that of thin hollow globes of glass with a paste made from irides- the scales of the shad and of the sea herring are capable of furnishing as choice a… … promptly placed in a receptacle containing water to which A GROUP OF GIRLS FORMING THE GLASS BEADS WHICH there has been added either 15 centigrams of chloride of silver FORM THE BASE OF THE ARTIFICIAL PEARL or else 3 gr. of salicylic acid. Five kilos of scales are re- quired for the preparation of…
Technology · Science
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