Journal of the Franklin Institute, Band 17;Band 21Pergamon Press, 1836 Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-59. |
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Seite 25
... square miles . The usual depth of rain that falls in this section of country can , I am informed , VOL . XVII.-No. 1. - JANUARY , 1836 . 4 with safety be premised at thirty - six inches per Report on Sandy and Beaver Canal . 25.
... square miles . The usual depth of rain that falls in this section of country can , I am informed , VOL . XVII.-No. 1. - JANUARY , 1836 . 4 with safety be premised at thirty - six inches per Report on Sandy and Beaver Canal . 25.
Seite 26
... rain that falls can be laid up in reservoirs . From this data it will be observed , that the three reservoirs above alluded to may be filled seven times per year . This exhibit will probably satisfy the most sceptical as to the adequacy ...
... rain that falls can be laid up in reservoirs . From this data it will be observed , that the three reservoirs above alluded to may be filled seven times per year . This exhibit will probably satisfy the most sceptical as to the adequacy ...
Seite 72
... rain . Inches Inches Inches . 1390 57 ° 29.65 29.50 W. Brisk . 258 63 .43 .43 Sw . do . 3 43 54 .46 .50 W. do . 4 43 ... rain with high winds . Rain - cloudy . Flying cloud - cloudy . Clear day . Clear day . Clear - hazy Hazy - do ...
... rain . Inches Inches Inches . 1390 57 ° 29.65 29.50 W. Brisk . 258 63 .43 .43 Sw . do . 3 43 54 .46 .50 W. do . 4 43 ... rain with high winds . Rain - cloudy . Flying cloud - cloudy . Clear day . Clear day . Clear - hazy Hazy - do ...
Seite 106
... rain which falls at the surface of the ground than above it . By A. D. BACHE , Prof. of Nat . Philos . and Chem , Univ , Penn . In the report of Prof. Phillips , of King's College , London , on the relative quantities of rain collected ...
... rain which falls at the surface of the ground than above it . By A. D. BACHE , Prof. of Nat . Philos . and Chem , Univ , Penn . In the report of Prof. Phillips , of King's College , London , on the relative quantities of rain collected ...
Seite 107
... rain , at different heights above the surface of the neighbour- ing ground , is caused by the continued augmentation of each drop of rain from the commencement to the end of its descent , as it traverses successive- ly the humid strata ...
... rain , at different heights above the surface of the neighbour- ing ground , is caused by the continued augmentation of each drop of rain from the commencement to the end of its descent , as it traverses successive- ly the humid strata ...
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Seite 247 - 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.
Seite 118 - 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, two reflecting telescopes, made by Mr.
Seite 144 - Experiments to measure the velocity of Electricity, and the duration of Electric Light.
Seite 237 - ... have not, by inadvertence, accident, or mistake, and without any fraudulent or deceptive intention, been complied with on the part of the said inventor, it shall be lawful for the Secretary of State, upon the surrender to him of such patent...
Seite 271 - 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...
Seite 190 - Institution is formed for the purpose of enabling mechanics and artisans, of whatever trade they may be, to become acquainted with such branches of science as are of practical application in the exercise of that trade ; that they may possess a more thorough knowledge of their business, acquire a greater degree of skill in the practice of it, and be qualified to make improvements and even new inventions in the arts which they respectively profess.
Seite 98 - As a member of the patent board for several years, while the law authorized a board to grant or refuse patents, I saw with what slow progress a system of general rules could be matured. Some, however, were established by that board. One of...
Seite 169 - On the other hand, there may be a valid patent for a new combination of materials previously in use for the same purpose, or for a new method of applying such materials.
Seite 275 - To all to whom these presents shall come be it known, that I, Thomas Loud, Jun.
Seite 181 - A certain quantity of heat will make some bodies good conductors that will not otherwise conduct. 16. Thus wax rendered fluid, and glass softened by heat, will both of them conduct. 17. And water, though naturally a good conductor, will not conduct well when frozen into ice by a common degree of cold; not at all where the cold is extreme.