Journal of the Franklin Institute, Volum 23;Volum 27Pergamon Press, 1839 Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-59. |
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anthracite apparatus appears applied atmosphere Barbadoes barometer blew blowing boiler boiling carbonate carbonic acid carriage centre centripetal theory Certificate of Honourable changed round Charleston claim Clear-do cloud coal colour combination Committee construction copper cylinder described diameter direction effect engine Espy exhibited experiments feet Franklin Institute furnace gale heat Honourable Mention hurricane improvement inches increase instrument invention iron John F. W. Herschel lead lime liquor machine manner manufacture means metal miles mode motion muriatic acid nearly needle nitric acid noon observations obtained operation oxide passed patent pearlash Philadelphia pieces pig metal plate portion produced Prussian blue prussiate of potash purpose quantity rail rail-road rain remarkable rollers screw shaft ship side silver solution specific gravity specimen steam storm substance sulphate sulphuric acid surface temperature tion tube upper vapour vessel violent weight wheel wind York zinc
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Side 402 - 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.
Side 97 - 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.
Side 265 - ... this operation it will be found that the results are sometimes more and sometimes less satisfactory, in consequence of small and accidental variations in the proportions employed. It happens sometimes that the chloride of silver is disposed to darken of itself, without any exposure to light : this shows that the attempt to give it sensibility has been carried too far. The object is to approach to this condition as near as possible without reaching it, so that the substance may be in a state ready...
Side 245 - I now declare that what I claim as my invention, and wish to secure by letters patent, is the...
Side 246 - Now know ye, that in compliance with the said proviso, I, the said Thomas Howell, do hereby declare the nature of my invention, and the manner in which...
Side 414 - He states that the cases of disease on the dark side of an extensive barrack at St. Petersburg have been uniformly for many years in the proportion of three to one to those on the side exposed to strong light.
Side 67 - 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 the Boring Mill constructed by Messrs.
Side 285 - The queen is supposed to be riding in state; over a riding habit she is attired in a large robe, or cloak, and the collar of the order of the garter; in her right hand she carries a sceptre, and on her head is placed a royal tiara or diadem. The attendant page, with his hat in his hand, looks up to the queen, whilst gently restraining the impatient courser, which is richly decorated with plumes and trappings. The inscription, "Victoria, Dei Gratia Britanniarum Regina, Fidei Defensor," is engraved...
Side 247 - Having now described the nature of my invention, and the manner of performing the same, I would have it understood, that although...
Side 265 - But if it is again washed with a liberal quantity of the solution of silver, it becomes again sensible to light, and even more so than it was at first. In this way, by alternately washing the paper with salt and silver, and drying it between times, I have succeeded in increasing its sensibility to the degree that is requisite for receiving the images of the camera obscura.