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Pot-pourri
508
CURRENT TOPICS.
[J. F. [.
istry and Industry states that a well-known English firm has now produced a series of bookcloths which are fast to light, undamaged by water and, in fact, can be washed if accidently soiled. These bookcloths may be had in a variety of colors from some of the fastest dyestuffs known. Particularly attractive are those bindings of Caledon Jade Green, the fastest green dye in existence. The one and only G. B. S. has chosen very appropriately this permanent and ever fresh Caledon Jade Green to enclose a 3o-odd volume edition of his works. A later edition has been bound in the unique Venetian Sail-cloth Red, probably a complementary color. C.
Pot-Pourri.--( The White Metal News Letter.) Maybe the housewife's complaint that kneading dough tires her arms is thoroughly justified. Dough is so resistant that it bends cast steel paddles a foot long and an inch thick at the neck and which do the kneading job for the mixing machines. In order to make these paddles stand up under this severe service, nickel alloy steel has been specified for them. Incidentally, it requires no less than eight horse power to push one of these paddles through dough at the rate of I2 times a minute. Bread requiring the consumption of that much energy should be good. And now we have oyster shoes which permit oyster fishermen to walk over oyster beds without sinking very much in the manner that snowshoes hold a person on top of the snow. In the State of Washington there is being cultivated a small-sized bivalve alliteratively called the Olympia oyster. That they .will not be trampled deep into their beds, the gatherers wear these special shoes consisting of monel metal channels and wires set in a wooden frame and having a device for attaching to the rubber boots of the wearers. A cap of nickel-chromium stainless steel will gleam from the summit of the 6o-foot monument to be built in the Arctic wastes as a memorial to Admiral Robert E. Peary, discoverer of the North Pole. This monument will stand on a high Greenland plateau overlooking Cape York about 600 miles inside the Arctic Circle. From torpedoes to bananas reads the fate of two former U. S. torpedo boat destroyers. With all naval accoutrements removed and the steam power plants replaced by Diesel engines, the speedy, broad-beamed, shallow-draft hulks are particularly suited for the transportation of perishable fruit. Before purchasing objects of white gold it might be well to make careful inquiries as to its caratage. There is a 12-carat white gold containing 20 per cent. nickel, 20 per cent. copper and Io per cent. zinc. An I8-carat white gold contains nickel, zinc and copper in
Oct., I932.]
CURRENT ToPIcs.
509
percentages of I6. 5, 5.0 and 3.5 respectively. Then again there is a truly noble white gold--21.6 carat--consisting of 9° per cent. gold and Io per cent. palladium. The development of light and strong aluminum alloys for automobiles and aeroplanes goes on apace. Certain new alloys differ from older strong alloys in that a minimum of copper is used, a mixture of nickel and chromium being alloyed with the aluminum instead. This alloy has been fabricated in the form of extruded sections which, with structural sections, have been made with 60,000 pounds yield point and 70,000 pounds ultimate strength. They give a I5 per cent. elongation and have an elasticity indicated by 3-T, which means that a sheet can be bent over a radius of two to three times the thickness of the sheet. The average length of use of a truck motor valve is about I5,ooo miles before regrinding is necessary. In order to lower replacement costs, several large bus operators have begun tests on a valve which has a monel metal stem and copper-nickel head. It is said to last several times as long as the ordinary valve. Instead of the yellow gold leaf, the booklover may have his much prized volumes titled in white palladium leaf. Pure nickel rod, one-half-inch round, is being used to administer radium treatments in the Henry Ford Hospital, Detroit. The radium is placed in a shallow cup machined in one end of the rod a nd allowed to filter through the metal during the treatment. C. Tooth Paste Myths.--(U. S. Department of Agriculture Clip Sheet No. I38.) While some tooth pastes and dentifrices are advertised as cures or preventives for pyorrhea, Riggs' disease, tender gums or other mouth disorders, the buyer will find very few, if any, dentifrices entering into interstate trade actually labeled with remedial claims for these maladies. According to Dr. F. J. CULLEN,of the Federal Food and Drug Administration, there is no drug nor combination of drugs capable of curing pyorrhea and certain other diseases of the mouth. Nor may the buyer expect to find any tooth paste which has any permanent effect in correcting tooth decay and what is popularly known as halitosis. Dentifrices have no magical composition, says Cullen. Their ingredients include precipitated chalk, soap, water, b a k i n g soda, borax, magnesia, glycerin, alcohol, a sweetening agent and medicinal oils intended to give the article an attractive color or taste. C.
CURRENT TOPICS.
[J. F. [.
istry and Industry states that a well-known English firm has now produced a series of bookcloths which are fast to light, undamaged by water and, in fact, can be washed if accidently soiled. These bookcloths may be had in a variety of colors from some of the fastest dyestuffs known. Particularly attractive are those bindings of Caledon Jade Green, the fastest green dye in existence. The one and only G. B. S. has chosen very appropriately this permanent and ever fresh Caledon Jade Green to enclose a 3o-odd volume edition of his works. A later edition has been bound in the unique Venetian Sail-cloth Red, probably a complementary color. C.
Pot-Pourri.--( The White Metal News Letter.) Maybe the housewife's complaint that kneading dough tires her arms is thoroughly justified. Dough is so resistant that it bends cast steel paddles a foot long and an inch thick at the neck and which do the kneading job for the mixing machines. In order to make these paddles stand up under this severe service, nickel alloy steel has been specified for them. Incidentally, it requires no less than eight horse power to push one of these paddles through dough at the rate of I2 times a minute. Bread requiring the consumption of that much energy should be good. And now we have oyster shoes which permit oyster fishermen to walk over oyster beds without sinking very much in the manner that snowshoes hold a person on top of the snow. In the State of Washington there is being cultivated a small-sized bivalve alliteratively called the Olympia oyster. That they .will not be trampled deep into their beds, the gatherers wear these special shoes consisting of monel metal channels and wires set in a wooden frame and having a device for attaching to the rubber boots of the wearers. A cap of nickel-chromium stainless steel will gleam from the summit of the 6o-foot monument to be built in the Arctic wastes as a memorial to Admiral Robert E. Peary, discoverer of the North Pole. This monument will stand on a high Greenland plateau overlooking Cape York about 600 miles inside the Arctic Circle. From torpedoes to bananas reads the fate of two former U. S. torpedo boat destroyers. With all naval accoutrements removed and the steam power plants replaced by Diesel engines, the speedy, broad-beamed, shallow-draft hulks are particularly suited for the transportation of perishable fruit. Before purchasing objects of white gold it might be well to make careful inquiries as to its caratage. There is a 12-carat white gold containing 20 per cent. nickel, 20 per cent. copper and Io per cent. zinc. An I8-carat white gold contains nickel, zinc and copper in
Oct., I932.]
CURRENT ToPIcs.
509
percentages of I6. 5, 5.0 and 3.5 respectively. Then again there is a truly noble white gold--21.6 carat--consisting of 9° per cent. gold and Io per cent. palladium. The development of light and strong aluminum alloys for automobiles and aeroplanes goes on apace. Certain new alloys differ from older strong alloys in that a minimum of copper is used, a mixture of nickel and chromium being alloyed with the aluminum instead. This alloy has been fabricated in the form of extruded sections which, with structural sections, have been made with 60,000 pounds yield point and 70,000 pounds ultimate strength. They give a I5 per cent. elongation and have an elasticity indicated by 3-T, which means that a sheet can be bent over a radius of two to three times the thickness of the sheet. The average length of use of a truck motor valve is about I5,ooo miles before regrinding is necessary. In order to lower replacement costs, several large bus operators have begun tests on a valve which has a monel metal stem and copper-nickel head. It is said to last several times as long as the ordinary valve. Instead of the yellow gold leaf, the booklover may have his much prized volumes titled in white palladium leaf. Pure nickel rod, one-half-inch round, is being used to administer radium treatments in the Henry Ford Hospital, Detroit. The radium is placed in a shallow cup machined in one end of the rod a nd allowed to filter through the metal during the treatment. C. Tooth Paste Myths.--(U. S. Department of Agriculture Clip Sheet No. I38.) While some tooth pastes and dentifrices are advertised as cures or preventives for pyorrhea, Riggs' disease, tender gums or other mouth disorders, the buyer will find very few, if any, dentifrices entering into interstate trade actually labeled with remedial claims for these maladies. According to Dr. F. J. CULLEN,of the Federal Food and Drug Administration, there is no drug nor combination of drugs capable of curing pyorrhea and certain other diseases of the mouth. Nor may the buyer expect to find any tooth paste which has any permanent effect in correcting tooth decay and what is popularly known as halitosis. Dentifrices have no magical composition, says Cullen. Their ingredients include precipitated chalk, soap, water, b a k i n g soda, borax, magnesia, glycerin, alcohol, a sweetening agent and medicinal oils intended to give the article an attractive color or taste. C.