Cross, C. F., and Bevan, E. J. "Researches on Cellulose," Longmans, Grem & Co., London, New York, 1913. Foltzer, Joseph. "Artificial Silk and Its Manufacture," Sir Isaac Pitman &Sans. Ltd., London, 1921. Margosches. "Die Viskose," 1906. Suevern, C. "Die Kuenstliche Seide," 1920. Tariff Information Sunreys. "Arti6cial Silk," U. S. Government Printing Office, 1925. Wheeler, Edward. "The Manufacture of Artiicial Silk in Relation to Colloid Chemistry," Fifth Report on Colloid Chemistry, 1923, British Association for the Advancement of Science. Worden, E. C. "'Nitracellillose Industry," D. Van Nostrand Co., New York, 1911.
Wearability of Steel Tested Electrically. How different kinds of steel will wear under all sorts of conditions can he tested accurately in the chemical laboratory. Dr. H. Beeny, a metallurgist from Sheffield, England, who addressed the recent meeting of the American Electrochemical Society, told haw he used the method to test the effect of manganese in the corrosion of steel. A piece of steel and a piece of gold, connected by copper wire, were immersed in a weak salt solution, and the corrosion taking place on the steel set up an electric current which was measured. Dr. Beeny claims that corrosion in the air as well as corrosion in a solution is never "purely chemical," hut electrochemical. Mercurochrome Helpful in Leprosy Treatment. The recently developed antiseptic mercurochrome has been found.beneficia1 in the treatment of lepers a t the U. S. hospital a t Carville, Louisiana, according to a statement made by a *up of physicians in the U. S. Public Health Service. *While the chemical has not given indicacure, its use has, in many cases. been followed bv definite imtions of being- a specific provement of certain stubborn and distressing symptoms. The use of this new antiseptic, which is an organic compound of mercury, is reminiscent of earlier efforts in the treatment of leprosy, where calomel and other inorganic mercury salts were used. The new material, however, gives much more encouragina .. results than the old.-Science Sewice Chemical Aladdin's Cave Bound in Germany. A series of grottoes, mined for alum and vitriol long before Columbus was horn and rediscovered shortly before the Worldwar by the Berlin geologist, Dr. Hess van Wichdofl, have just been found t o be a veritable chemical treasure trove. A spring claimed to be the "strongest" spring in the world issues from one of the most beautiful parts of the grottoes and contains phosphorus, arsenic, and iron sulfate. Minerals of the rarest colors jewel the caws in numherlessmany-hued formations. Chemists, physicists, and geologists, who examined the springs and minerals systematically ior a year and a half from a scientific and medicinal viewpoint, have found radioactive springs such as have never before been found. Tests have revealed that the springs are almost bubbling drugstores. Besides phosphorus, iron, and arsenic, they contain in addition molybdenum, copper, aluminium, manganese, calcium, magnesium, sodium, and potash.-Science Sem'ce
