530 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



though such results have not followed to so great an extent 

 as was feared, experience has shown that these apprehensions 

 were well founded. The Florida cable, for instance, is thought 

 to have received serious injury from turtles nibbling at the 

 sea-weeds, etc., incrusting it ; and we now learn from Land 

 and Water that on one occasion the cable between Penan gr 

 and Singapore became defective, and, when taken up, was 

 found to have been j^erforated by the teeth of a saw-fish, 

 which tore away the coverings, and laid bare the conducting 

 wire. 2 J., June 14, 1873, 430. 



CASING FOR STEAM-BOILERS, PIPES, ETC. 



The following composition has been patented in England 

 for casing steam-pipes, etc.: Potter's clay, 1^ cwt. ; sawdust, 

 24 pounds; fine shavings, 12 pounds; cow's hair, 2^ pounds 

 tar, 18 pounds; water-glass (specific gravity 1.7), 18 pounds 

 creosote, 5 pints. Another formula consists of clay, \\ cwt. 

 cork dust, 24 pounds; cow's hair, 4 pounds; tar, 18 pounds 

 water-glass, 25 pounds; chalk, 10 pounds; coarse soap, 

 5 pounds; creosote, 7 pints. 5 6^, 159. 



CASING FOR STEAM-PIPES, ETC. 



According to R. Weinlig, the following is a serviceable, ex- 

 traordinarily cheap, and easily prepared substitute for the 

 justly popular Leroy's composition. Very porous, thick pa- 

 per is first wrapped around the pipes and fastened with wire, 

 and then coated with dilute sugar sirup. A mixture of six 

 bushels of clay, nine bushels of sand, or, better still, of very 

 fine coke, is made, with as little water as possible, and three 

 buckets of sirup and 30 pounds of fine graphite are added. 

 This is laid on about three quarters of an inch thick, and cov- 

 ered once or twice with tar or linseed-oil varnish. For larixer 

 vessels, the composition should be mixed with hair enough 

 to retain its plasticity, and be laid on from about one to one 

 and a quarter inches. 14 (7, 1873, CCYIL, 508. 



MOTOR FOR SMALL MACHINES. 



Les Mondes asks its readers to examine a new motor con- 

 structed by Lambrigot, of Paris, which seems well adapted to 

 small machinery (such as pumps, sewing-machines, organs, 

 small screw vessels, etc.) by reason of its small size, peculiar- 



