Journal of the Franklin Institute of the State of Pennsylvania for the Promotion of the Mechanic Arts: Devoted to Mechanical and Physical Science, Civil Engineering, the Arts and Manufactures, and the Recording of American and Other Patent InventionsFranklin Institute, 1831 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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الصفحة 29
... appear obvious to every discerning mind , as the metal is not brought into contact while in a state of fusion , with any part of the mineral coal . From the intense heat of the furnace , the volatile parts of the coal are consumed , or ...
... appear obvious to every discerning mind , as the metal is not brought into contact while in a state of fusion , with any part of the mineral coal . From the intense heat of the furnace , the volatile parts of the coal are consumed , or ...
الصفحة 38
... appear that the lieutenant has not yet ascertained which is the best form to be adopted , for he describes several . One plan is to introduce a circular bend in its middle , ( thus - ) ; another , with an elliptical opening in its ...
... appear that the lieutenant has not yet ascertained which is the best form to be adopted , for he describes several . One plan is to introduce a circular bend in its middle , ( thus - ) ; another , with an elliptical opening in its ...
الصفحة 44
... appears to excite more interest in the community at large . This the Board believe to be in a measure due to the ... appear to have continued stationary , while the demands upon our funds have greatly increased since the origin of 44 ...
... appears to excite more interest in the community at large . This the Board believe to be in a measure due to the ... appear to have continued stationary , while the demands upon our funds have greatly increased since the origin of 44 ...
الصفحة 54
... appear to be ill founded , whether either can be actually applied in practice . " This passage , ( I have no doubt the Editor himself will admit , ) is objectionable , not only in coupling the two inventions , so essentially different ...
... appear to be ill founded , whether either can be actually applied in practice . " This passage , ( I have no doubt the Editor himself will admit , ) is objectionable , not only in coupling the two inventions , so essentially different ...
الصفحة 69
... manner in which they were attended , appear to have given satis- faction . Through the exertions of our worthy and efficient delegates , an annual appropriation of three hundred dollars was made by the Maryland Institute . 69.
... manner in which they were attended , appear to have given satis- faction . Through the exertions of our worthy and efficient delegates , an annual appropriation of three hundred dollars was made by the Maryland Institute . 69.
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acid apparatus applied attached axis axle boiler bottom buckets carriage cast iron cause centre charcoal claim cloth colour committee common construction copper cylinder degree described dew point diameter drawing edge effect employed equal evaporating exhibited experiments explosion feet fire flue force pump frame FRANKLIN INSTITUTE friction furnace give grain gudgeons heat high pressure hole horizontal improvement inches invention Journal June 13 labour length less lever machine machinery manner manufacture means metal mode motion mould object observed obtained operation paper pass patent Pennsylvania piece pig metal pipe placed plate potash pounds present principle produced pump purpose quantity quicksilver rails revolving rollers safety valve screw shaft side Silver Medal sirop specification steam boats steam engine sufficient surface telescopes temperature thickness Thrashing tion tube upper vapour velocity vessel VII.-No water wheel weight wheel whole wood wrought iron York
مقاطع مشهورة
الصفحة 58 - I' the commonwealth I would by contraries Execute all things: For no kind of traffic Would I admit; no name of magistrate; Letters should not be known ; riches, poverty, And use of service, none; contract, succession, Bourn, bound of land, tilth, vineyard, none; No use of metal, corn, or wine, or oil; No occupation; all men idle, all, And women too, but innocent and pure : No sovereignty— Seb.
الصفحة 85 - Be it known that I, John Fitch, of Philadelphia, in the county of Philadelphia, the State of Pennsylvania, have invented a new and improved mode of preventing steam-boilers from bursting, and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.
الصفحة 354 - Increase or diminution of the effect, with the increased or diminished intensity of the cause, in cases which admit of increase and diminution. 4th. Proportionality of the effect to its cause in all cases of direct unimpeded action. 5th. Reversal of the effect with that of the cause.
الصفحة 411 - Two centuries ago not one person in a thousand wore stockings; one century ago not one person in five hundred wore them; now not one person in a thousand is without them.
الصفحة 414 - It is nevertheless apparent, even from observing only the expression of countenance, the complexion, and the gait, that the functions of the stomach and the heart are greatly impaired, even in those who consider themselves well. We see no plump and rosy tailors; none of fine form and strong muscle.* The spine is generally curved.
الصفحة 238 - ... tons, then it might be put on only four wheels. The company to be at liberty to test the boiler, etc., by a pressure of one hundred and fifty pounds to the square inch.
الصفحة 353 - ... in force against that of our intellectual and moral wants. Knowledge is not, like food, destroyed by use, but rather augmented and perfected. It acquires not, perhaps, a greater certainty, but at least a confirmed authority and a probable duration, by universal assent: and there is no body of knowledge so complete but that it may acquire accession, or so free from error but that it may receive correction in passing through the minds of millions.
الصفحة 350 - Hastings' sand; while this, on which Bexhill is situated, is separated from the coal-strata by a series of interposed beds of such enormous thickness as to render all idea of penetrating through them absurd. The history of mining operations is full of similar cases, where a very moderate acquaintance with the usual order of nature, to say nothing of theoretical views, would have saved many a sanguine adventurer from utter ruin.
الصفحة 350 - In securing us from important mistakes in attempting what is, in itself, possible, by means either inadequate, or actually opposed, to the end in view.
الصفحة 238 - ... are inapplicable to American timber, though bearing the same name. It is much to be desired that numerous and accurate experiments be made in this country by those having the requisite zeal and opportunities ; our architects will then know with certainty the qualities of the different kinds of woods they are using, and instead of working at hazard and in the dark, as they now too often do, they will be guided by the sure light of practical science to certain and definite results. If these experiments...