Journal of the Franklin InstitutePergamon Press, 1892 Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415] |
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24 inches acid alloy aluminum ammonia apparatus armature armor arts atmosphere back bulge bearing metal boiler bourrelet bulge was formed canal carbon cellulose cent coal coils Committee compound locomotive compressed air compressor connection copper cracks cubic cubic centimetres curve CXXXIII cylinder dynamo dynamotor electric electro-magnetic energy ether exhaust experiments feet FRANKLIN INSTITUTE heat high-pressure cylinder hole inches high inches in diameter increase iron Journal lignin live steam low-pressure cylinder machine magnetic magnetic circuit manufacture means mechanism ments method miles motion motor nickel-steel plate obtained one-half operation patent Pennsylvania Railroad Philadelphia phosphor-bronze pipe piston plunger port pounds pressure Prof projectile entered Railroad reheating resistance Rhode Island Locomotive running Scale 80 simple engine solenoid speed steam steel sulphuric acid temperature tensile strength tion tube valve vapor vessels volume wire York
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Page 415 - I employ the steam after it has acted in the first vessel to operate a second time in the other, by permitting it to expand itself, which I do by connecting the vessels together, and forming proper channels and apertures, whereby the steam shall occasionally go in and out of the said vessels. Thirdly, I condense the steam, by causing it to pass in contact with metallic substances, while water is applied to the opposite side.
Page 462 - By being .old when i was young, I find myself young now I am old. I led a sober, studious, but not a lazy or sedentary life. My diet was sparing, though delicate...
Page 415 - The Committee on Science and the Arts constituted by the Franklin Institute of the State of Pennsylvania, for the promotion of the Mechanic Arts, to whom was referred for examination a Solar Compass, invented by WM.
Page 130 - ... an instrument by the help of which the direction and velocity of a given motion can be altered.
Page 268 - The alloys of aluminum with copper in proportions of from 2 to 15 per cent have been advantageously used to harden aluminum in cases where a more rigid metal is required than pure aluminum. Copper is the most common metal used at present to harden aluminum. A few per cent of copper decreases the shrinkage of the metal, and gives alloys that are especially adapted for art castings. The remainder of the range, from...
Page 254 - ... of impurity, as the pure metal is very soft and not so strong as the less pure. It is only where extreme malleability, ductility, sonorousness, or non-corrodibility is required that the purest metal should be chosen. We shall probably find that for most purposes a small percentage of other elements than silicon and iron are advantageously added in producing hardness, rigidity, and strength — constituents that will not detract from the non-corrodibility of the metal as much as do these natural...
Page 213 - A line of magnetic force may be denned to be that line which is described by a very small magnetic needle, when it is so moved in either direction correspondent to its length, that) the needle is constantly a tangent to the line of motion...
Page 471 - ... cc. dilute sulphuric acid and allow the lead sulphate to settle. Filter into a 1,000 cc. flask and fill to the mark with distilled water. The filter contains the gold which has been collected and carried down by the sulphate of lead. The filter paper and precipitate are dried, the paper burned and the ash and lead sulphate scorified with test lead. The button is cupelled and the gold, with any trace of silver it may contain, is weighed.
Page 268 - With the exception of lead, antimony and mercury, aluminum unites readily with all metals ; and many useful alloys of aluminum with other metals have been discovered within the last few years, and I prophesy that many more will be found within the next few years.
Page 467 - After fifty, bathe the eyes morning and evening with water so hot that you wonder how you stand it ; follow this with cold water, that will make them glow with warmth.