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Author: National Academy of Sciences
Publisher:
ISBN: 9781330478349
Category : Science
Languages : en
Pages : 324
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Excerpt from Memoirs of the National Academy of Sciences, Vol. 2 Sir: I have the honor to transmit to you, through the hands of Professor Coffin, the report of the committee of the Academy, to which was intrusted the arrangements for securing observations of the eclipse of May, 1883. It contains the reports and observations of Professor Holden and his associates in the expedition, and I have, in compliance with a request of the committee. prefixed a brief introduction, giving an account of the proceedings of the committee and of the organization of the party. 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.
Author: National Academy of Sciences
Publisher:
ISBN: 9781330478349
Category : Science
Languages : en
Pages : 324
Get Book Here
Book Description
Excerpt from Memoirs of the National Academy of Sciences, Vol. 2 Sir: I have the honor to transmit to you, through the hands of Professor Coffin, the report of the committee of the Academy, to which was intrusted the arrangements for securing observations of the eclipse of May, 1883. It contains the reports and observations of Professor Holden and his associates in the expedition, and I have, in compliance with a request of the committee. prefixed a brief introduction, giving an account of the proceedings of the committee and of the organization of the party. 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.
Author: U. S. National Academy of Sciences
Publisher: Forgotten Books
ISBN: 9780656228553
Category : Science
Languages : en
Pages : 776
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Book Description
Excerpt from Memoirs of the National Academy of Sciences, Vol. 8 This work was undertaken at the instance of Dr. John S. Billings, Director of the Laboratory of Hygiene, University of Pennsylvania, with the view of obtaining, if possible, some explanation, from a bacteriological standpoint, of the greater mortality among persons living in houses built on made ground over those living on virgin soil. In some cities, as Washington and New York, filled localities can be mapped out and the course of old runs followed by the higher death rate in these districts. N 0 positive opinion can be based on the data so far obtained, and these notes are presented mainly as a small contribution to our knowledge of the bacteria of the soil. In the prosecution of the work I have had the advice of Dr. Billings and of Dr. A. C. Abbott, first assistant, to both of whom I am much indebted. 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.
Author: National Academy Of Sciences
Publisher: Forgotten Books
ISBN: 9780265050460
Category :
Languages : en
Pages : 20
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Excerpt from Memoirs of the National Academy of Sciences, Vol. 10: Second Memoir A glance at the literature and a consideration of the species themselves must necessarily convince even the most critical systematist that Claytonia, as heretofore defined, can not possi bly be confounded with Monti, nor Montia with Claytonia. They both have been excellently described and seemingly well understood now for at least a century and a half. 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.
Author: National Academy of Sciences
Publisher: Forgotten Books
ISBN: 9780282509620
Category : Social Science
Languages : en
Pages : 614
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Excerpt from Memoirs of the National Academy of Sciences, 1941, Vol. 23 3. Observations and measurements on the members of the National Academy of Sciences. By Ales Hrdlieka 1 - 108. 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.
Author: National Academy of Sciences
Publisher: Forgotten Books
ISBN: 9781390925661
Category : Science
Languages : en
Pages : 1002
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Excerpt from Memoirs of the National Academy of Sciences, 1922, Vol. 16 Chief, bureau OF biological survey, united states department OF agriculture. 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.
Author: National Academy of Sciences
Publisher: Forgotten Books
ISBN: 9780332472928
Category : Science
Languages : en
Pages : 468
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Excerpt from Memoirs of the National Academy of Sciences, Vol. 6 It will be found that the seeond number of (2) depends on m, d and It, and these are knoun quantities when the elements of Q, and 31 are. Given. The. Use of the equation is moreover greatly simplilied and enhanced by the fact that the plane of the planet's orbit is involved only in 80 far as that it must eontain the. Tangent to 3! At E. 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.
Author: United States National Academy Sciences
Publisher: Forgotten Books
ISBN: 9780656848256
Category : Science
Languages : en
Pages : 470
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Excerpt from Memoirs of the National Academy of Sciences, Vol. 10 It is evident, however, that any nonhomogeneity or figure error which is symmetrical with respect to the center of the ring can not be detected by observations on the period; hence the necessity of comparing results with a number of rings. With this in mind, five forgings for rings were obtained, of which one was broken during construction; but on account of the great labor involved in making a finished ring, only two have been completed and used. 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.
Author: National Academy of Sciences
Publisher: Forgotten Books
ISBN: 9780656047338
Category : Science
Languages : en
Pages : 354
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Excerpt from Memoirs of the National Academy of Sciences, Vol. 1 Those portions of the computations which I have not made in person have been made at my expense, and I desire to express my thanks to my pupils and assistants, Messrs. John N. Stock well, erving winslow, william H. Palmer, S. C. Chandler, jr., and S. S. Eastwood, for their valuable aid. Mr. Winslow has taken part in all the computations from the beginning. The catalogue contains 6497 observations of 2907 stars situated between the parallels of 500 north and 355 south declination. 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.
Author: National Academy of Sciences
Publisher:
ISBN: 9781332158966
Category : Science
Languages : en
Pages : 390
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Excerpt from Memoirs of the National Academy of Sciences, Vol. 9 The species of this group are all more or less protectively colored. Their grayish, brownish hues, with yellowish or sometimes greenish markings, harmonize with the tints of the bark of the trunk or branches of trees, whether grown over with lichens or not. In their shape and size, whether at rest or flying, they closely resemble the species of Noctuidae. They differ as a rule, however, in their slower flight, and in resting on the bark or among the leaves of trees, not nestling in grass or low heritage. There are almost no observations yet made on the protective attitudes of notodontian moths, and the subject needs to be carefully studied. Long and close observations in the field with the aid of the camera are needed before we shall have a satisfactory body of facts, and it is to be hoped that this line of study will be taken up by lepidopterists of future generations. Many observations have doubtless been made by breeders of moths, but not published. What we have to say is mainly in the line of suggestion. The colors and attitudes of the more typical members of the family, as the species of Notodonta, Pheosia, Lophodonta, etc., when at rest, with their tufts and the consequent production of angles and points, assimilate them with the bark of trees or twigs wich salient parts, buds, and other projecting points. Those who have seen species of geometrids, Ingura, etc., at rest, with their tails curled up and their wings partly spread out, will readily understand how the species of Apatelodes, Melanopha, etc., with their tufted abdominal tips, angulated wings, and bars and spots, would tend to conceal them from the prying eyes of birds. The species of Melalopha (M. inclusa and strigosa) sit with the wings folded sharply over the back, with the fore legs held straight out in front, and the tufted tail upcurved. (Monogr. Bombycine Moths, 1, p. 181.) The pale yellowish hues of Datana and Nadata, the latter with its high dorsal thoracic tuft, assimilate them with yellow and brown leaves. Here reference might be made to Professor Poulton's statement that the shape and color of Scoliopteryx lihatrix "forcibly suggest the appearance of a red leaf spotted with a few white bosses of fungoid growth." (Trans. Ent. Soc. London. 1887, p. 308.) Hyparpax aurora may be found, like Rhodophora florida, to frequent pink and yellow flowers. How the very unusual and conspicuous markings of Edema albifrous and of Nerice bidentata may mimic the dentate edges of leaves or projections of other objects will doubtless be eventually cleared up. The ground shades and tints of the species of Schizura and Heteroeampa, with their green and yellowish spots and streaks would, when the moths are resting on lichen-covered bark of their food trees, amply protect them from the observation of birds. This has been pointed out by Riley in the case of Schizura unicornis. 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."
Author:
Publisher: Forgotten Books
ISBN: 9780331888621
Category : Science
Languages : en
Pages : 552
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Excerpt from Memoirs of the National Academy of Sciences, Vol. 13 It seems obvious that such practices would in time produce great confusion and that the chances of lessening such a confusion would decrease as time passed. The history and geography of a fall must be the important factors in determining its right to be regarded individual. Of these two factors the history must be determined from all available literature, while the geography can readily be shown by mapping. To undertake this task for the meteorites of a single large geographic province such as North America seemed to the writer desirable, not only for the intrinsic value of the record, but to throw light on the question of the extent to which individual falls may be naturally or artificially distributed. Funds for assistance having been generously provided through a grant from the J. Lawrence Smith Fund of the National Academy of Sciences, such a catalogue was undertaken and is here presented. Prof. W. C. Macnaul, of Chicago, rendered valuable assistance in the bibliographic work and translating. In the preparation of the text of this catalogue the endeavor of the writer has been to collect all published facts of importance regarding the different falls. Several methods of grouping these facts were considered, but it was finally concluded that an essentially chrono logical treatment would be the most satisfactory. Such a grouping shows in historical order the growth of knowledge regarding each fall and enables one to appreciate the difficulties of the earlier investigators and the manner in which features overlooked or not understood by them were later made clear. For example, Cambria was early described as showing nodules composed of two kinds of iron sulphide, one decomposable and regarded as troilite, the other unattacked by acids and regarded as pyrrhotite. It remained for later investigation to show that the pude composable constituent was schreibersite. 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.
