Excerpt from Index to the Reports of the Committee on Science and the Arts of the Franklin Institute of the State of Pennsylvania, 1834 1890 To perform such duties as may devolve upon them, and to sustain by their labors the scientific character of the Institute. Originally this committee consisted of such members of the Institute as should voluntarily enroll themselves as pledged to perform such work, and their reports were submitted to the Insti tute for ratification. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

This index provides a comprehensive listing of the reports issued by the Committee on Science and the Arts of the Franklin Institute of the State, covering the period from 1831 to 1849. The index is designed to be a valuable resource for scholars and students of the history of science. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

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Excerpt from Journal of the Franklin Institute of the State of Pennsylvania, 1834, Vol. 18: Devoted to the Mechanic Arts, Manufactures, General Science and the Recording of American and Other Patented Inventions It is well known that the bars become loose from vibra tion, and other causes, and in running round a curve in the direction of the arrow in the figure; the centrifugal force acting against the bar A, forces it from its place, which leaves the point ofthe bar B projecting; this defect is often increased by the bars being previously out of line. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Journal of the Franklin Institute of the State of Pennsylvania, 1833, Vol. 12: Devoted to the Mechanic Arts, Manufactures, General Science, and the Recording of American and Other Patented Inventions The great difficulty in resorting to this means of discrimination, is, that an electrified body may, by induction, produce in a conductor al ternately, Opposite states of electrical excitement. As it approximates the conductor, it may cause it to receive, or give out electricity; of course, when retracted, the conductor will have the opposite excite ment to that consequent to approximation. Supposing the brass ball of the electrometer in question, to be affected in the mode just de scribed, the leaf suspended from it, must be successively attracted by each pole. Besides, the excitement may be so strong, as to render that ofthe series nugatory; as in the case of a powerful magnet, which will attract either pole of a feeble one. The direction of the first pulsation of the leaf, is the best criterion; but reliance should not be accorded to one experiment, especially when so easily repeated. I find that a gilt pith ball, if suspended in place of the leaf, will vibrate for a time. It is, however, like the leaf, liable to have its movements arrested by an adherence, to one or other of the knobs. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Journal of the Franklin Institute of the State of Pennsylvania, 1834, Vol. 13: Devoted to the Mechanic Arts, Manufactures, General Science, and the Recording of American and Other Patented Inventions Another seed valuable for oil is the sun flower: I have never tried this, but am told it produces a very excellent salad oil; I have no doubt the culture of it, properly managed, would be both useful and profitable. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.