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Monazite sand from travancore
CURRENT TOPICS.
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A u t o m o b i l e Exports. ANON. (,4met. Mach., xxxv, x5, 7oz.) --Canada is by far the largest market for automobiles exported from the United States. Of approximately 9,000 machines exported in the seven months ended with July, I9II, 3,724 went to Canada, 1,875 to the United Kingdom, 983 to British Oceania (chiefly to Australia and New Zealand), 477 to Asia and nonBritish Oceania, AA4 to South America, z73 to France, I75 to the West Indies and Bermuda, I47 to Mexico, I37 to Italy, and 73 to Germany. These figures do not include the shipments to non-contiguous territory of the United States, the number sent to Hawaii was 2oz, to Porto Rico I54, and to Alaska 2.
Tantalum for Standard Weights. COM:IT]~ INTERNAT. DES POIDS ET M~SURES. (Proc~s Verbaux des S~ances, if, 6; Nature, Aug. 2 4 , I9II, 25I.)--Owing to the high price of platinum a suitable substitute has been sought for the construction of standard weights. Tantalum, which resists all mineral acids except hydrofluoric acid, is found to have the necessary permanence and hardness, and it is suggested that a series of standard weights of Ioo grammes, made of tantalum, should be established for use in chemical research. The cost would, probably, not exceed onethird of that of iridio-platinum weights. Monazite Sand f r o m Travancore, India. ANON. (Bull. Imp. Inst., ix, I O 3 . ) h A considerably extensive deposit of naturally concentrated monazite sand has been discovered near Quilon, Travancore, India. This sand contains 4 per cent. of thoria, and consists of from 46 to 50 per cent. of monazite, with ilmenite and zircon as the other chief constituents, together with some ruffle and traces of spinel, garnet, quartz, and hornblende. A specimen of pure monazite separated from the sand contained 8.5 per cent. thoria. The monazite can be concentrated by an electro-magnet. A specially-prepared concentrate contained 8.87 per cent. thoria, and pure monazite separated from this contained Io.o8 per cent. of thoria. The commercial concentrate contains 5 to 6 per cent. thoria, as compared with less than 4 per cent. in the Brazilian sand, and the pure monazite from the Travancore deposit is richer than that from. the Brazilian and Carolina deposits, resembling the monazite from Ceylon. P a p e r as a S u b s t i t u t e for Goldbeaters' S k i m
W. THEOBALD.
(Papier-fabrikant, ix, 983.)--Many attempts have been made to 4ntroduce paper as a substitute for the costly prepared skins used by goldbeaters, but only with partial success. Paper was employed before goldbeaters' skin for making leaf metals, and the Chinese and Japanese still use paper, made from the fibres of the mulberry tree for goldbeating. For the first stages of goldbeating,
89
A u t o m o b i l e Exports. ANON. (,4met. Mach., xxxv, x5, 7oz.) --Canada is by far the largest market for automobiles exported from the United States. Of approximately 9,000 machines exported in the seven months ended with July, I9II, 3,724 went to Canada, 1,875 to the United Kingdom, 983 to British Oceania (chiefly to Australia and New Zealand), 477 to Asia and nonBritish Oceania, AA4 to South America, z73 to France, I75 to the West Indies and Bermuda, I47 to Mexico, I37 to Italy, and 73 to Germany. These figures do not include the shipments to non-contiguous territory of the United States, the number sent to Hawaii was 2oz, to Porto Rico I54, and to Alaska 2.
Tantalum for Standard Weights. COM:IT]~ INTERNAT. DES POIDS ET M~SURES. (Proc~s Verbaux des S~ances, if, 6; Nature, Aug. 2 4 , I9II, 25I.)--Owing to the high price of platinum a suitable substitute has been sought for the construction of standard weights. Tantalum, which resists all mineral acids except hydrofluoric acid, is found to have the necessary permanence and hardness, and it is suggested that a series of standard weights of Ioo grammes, made of tantalum, should be established for use in chemical research. The cost would, probably, not exceed onethird of that of iridio-platinum weights. Monazite Sand f r o m Travancore, India. ANON. (Bull. Imp. Inst., ix, I O 3 . ) h A considerably extensive deposit of naturally concentrated monazite sand has been discovered near Quilon, Travancore, India. This sand contains 4 per cent. of thoria, and consists of from 46 to 50 per cent. of monazite, with ilmenite and zircon as the other chief constituents, together with some ruffle and traces of spinel, garnet, quartz, and hornblende. A specimen of pure monazite separated from the sand contained 8.5 per cent. thoria. The monazite can be concentrated by an electro-magnet. A specially-prepared concentrate contained 8.87 per cent. thoria, and pure monazite separated from this contained Io.o8 per cent. of thoria. The commercial concentrate contains 5 to 6 per cent. thoria, as compared with less than 4 per cent. in the Brazilian sand, and the pure monazite from the Travancore deposit is richer than that from. the Brazilian and Carolina deposits, resembling the monazite from Ceylon. P a p e r as a S u b s t i t u t e for Goldbeaters' S k i m
W. THEOBALD.
(Papier-fabrikant, ix, 983.)--Many attempts have been made to 4ntroduce paper as a substitute for the costly prepared skins used by goldbeaters, but only with partial success. Paper was employed before goldbeaters' skin for making leaf metals, and the Chinese and Japanese still use paper, made from the fibres of the mulberry tree for goldbeating. For the first stages of goldbeating,