Scientific American Volume 20 Number 03 (January 1869) . ic AmericanPatent Agency, by Jonathan Hunsberger, who may be ad-dressed for the sale of the entire right, or for state and countyrights, at Skippackville, Montgomery Co., Pa. the roads is entirely overlooked. Has it ever occurred to rail-road men that the use of oils of strong acid reaction has a ten-dency to weaken the strength of the boiler itself, as they havethe power to cut and destroy the bolts of the steam chest andcylinder ? •— ^ ?&*» - The Inventor of the Velocipede.—The last number oftho Moniteur de la Photographie of Paris, (1
Scientific American Volume 20 Number 03 (January 1869) . ic AmericanPatent Agency, by Jonathan Hunsberger, who may be ad-dressed for the sale of the entire right, or for state and countyrights, at Skippackville, Montgomery Co., Pa. the roads is entirely overlooked. Has it ever occurred to rail-road men that the use of oils of strong acid reaction has a ten-dency to weaken the strength of the boiler itself, as they havethe power to cut and destroy the bolts of the steam chest andcylinder ? •— ^ ?&*» - The Inventor of the Velocipede.—The last number oftho Moniteur de la Photographie of Paris, (1st Nov., 1868) hasan interesting series of letters upon the invention of the ve-locipede, which, it appears, would be due to Mepce, for whomis claimed also the invention of photography. The letters inquestion are written from Claude Niepce to his brother Nice-phore Niepce, and are dated from Hammersmith, near London,Nov. and Dec, 1818, and August, 1819. We do not gleanfrom them that th£ first idea of a velocipede originated with. HUMBEEGEES PATENT SELE-BISCHABGING HORSE RAKE, Nicephore Niepce,,but simply that he was occupied with* someexperiments concerning the improvement of this kind of lo-comotive. If no mention can be found of a velocipede prior tothe year 1818 doubtless Niepce has good claim to its invention. Improved Engine and Signal Oils for I&ailroads. Throughout the country, says Peases Oil Circular, there is abetter demand for first-class oils. In many cases what is gainedin price of* cheap oils is lost ten times over in the repair ac-count. There is an enormous loss of power in our railroadsby the use of cheap oils, and we include in this those oilseasily affected by Beat. The experiments of Metz and Morinin 1831, and others up to the present date establish the factthat the amount of friction is found to be dependent ratherupon the nature of the unguents than upon the surface of con-tact, and the nature of the oils must be measured by the pres-sure or weight
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