Libros de Ciencias, página 2218 de 8149

Excerpt from Quack Grass Eradication, Prepared Especially for Farmers Desirous of Destroying This Dangerous PestFor many years thinking agriculturists have been watching with great apprehension the rapidly increasing growth and spread of the Weed known as quack grass. A few years ago this pest was only found in scattered sections of the northern part of the United States, and on isolated farms, but today there are whole town ships and counties that are almost totally in fested with the weed. When quack grass takes possession of land, the growing of profitable crops is almost out of the question. T o acquaint those farmers, who are unfamiliar with quack grass, with the seriousness of this pest and to offer suggestions as to its eradication, is the purpose of this booklet.We know of just one man in the United States who has completely and absolutely killed, at will, any considerable quantity of quack grass. We say absolutely killed for the reason that there are many experimenters who have been partiallysuccessful along this line. That man is Mr. P. B. Crane of Long Lake, Minn. The result of his work has been carefully scrutinized by competent agricultural experts who have given the result of his work unqualified approval. Up until this time, however, his process has been unknown, Mr. Crane having formerly made it a practice to contract eradication of quack grass and to sell information concerning the process. For the benefit of those farmers who have quack-infested farms at this time, we have persuaded Mr. Crane to publish in book form the results of his in vestigations, combining with his experience all other known information about the weed.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the o

Excerpt from Service Chemistry a Manual of Chemistry and Metallurgy and Their Application in the Naval and Military ServicesAT no time in the worlds history has the need for scientific knowledge in our two great Services been more important than at the present, whilst probably at no time has the period which could be devoted to acquiring it been shorter, and this book is an attempt to supply, as far as may be, a rational treatise on the more chemical side of the many subjects with which Officers are brought in almost daily contact.In the short time that can be devoted to subjects outside the professional Service routine, it is impossible to acquire a complete knowledge of any of the many branches of science that enter into modern Service work, but the authors have found from long experience that it is quite possible to so develop the purely theoretical side of a science as to lead naturally up to the more technical details of such Service questions as are necessary to a Naval or Military career.The technical side of a science is merely its adaptation to our special needs, and without a knowledge of the facts and laws that govern the results we desire to attain, a Service technology would be a mere collection of data, useless in the future and of but little present value. On the other hand, to attempt to educate a busy Officer of any branch in all the modern theories, before he had grasped the importance to him of their application, would be to court failure, and we have attempted so to formulate the funda mental facts and theories of modern chemistry as to form a firm foundation for their application to such questions as modern ex plosives, fuel problems, the physical and chemical characteristics of the metals and alloys, military ballooning, boiler incrustations.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction

Excerpt from Bau und Leben Unserer WaldbumeK a p i t el xv. Einiges ber Blhen, Fruchten und Keimen der Bume.1.0rientieru 2. Die weiblic en Blten oder Bltenteile 3. Die mnnlichen Blten oder Bltenteile 4. Die Bestubung und Befrucha.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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 A Flora of LiverpoolThe terms common, frequent, rare, &c. Which I have used to denote the abundance or scarcity of any plant, are in general use among botanists, but as my own observa tions have necessarily been limited, some allowance must be made for any occasional misapplication of terms. Further observation may prove some plants to be com mon, which at present may only have been observed in a few localities With the assistance of Dr. Dickinson and Mr. Tudor, I have endeavoured to give more accurate information on this head, in the index, by prefixing the same signs as are usedgby the Edinburgh Botanical So ciety, an explanation of which will precede the Index.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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 Suggestions for Garden Work in California SchoolsTo the teachers in California public schools no apology should be needed for introducing the subject of gardening. The school garden has come to stay. It is not a fad. On the contrary, it is a fundamental prerequisite to all true nature-study, and the value and place of true nature-study is now firmly estab lished. The term nature-study is more or lessfamiliar to all, but the conception of the meaning of realnature-study is not so general. However, the works of Hodge, J ackman, Bailey, Holtz, and others and the nature-study Review, the official organ of the nature-study Association, together with the efforts of educational institutions from the national bureau down to the individual normal schools, are all helping to infuse the new ideal into the minds of American teachers. Nature - study is many sided. The physical, the biological, the agricultural phases all have their valuable features, but authorities are quite gener ally agreed that, if any one phase deserves prominence, that phase is the agricultural especially when introduced through garden work.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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 A Problem Course in ChemistryThe object has been not to set an arbitrary standard for other teachers to follow, but to compile such a set of problems as will meet the needs of the individual teacher and the in dividual student.In the interest of variety and thoroughness, more than six hundred problems are furnished, although the authors have found in their own classes that one hundred and fifty of these exercises, related to the laboratory and text-k material, provide a satisfactorily balanced years work.The fundamental principles essential to an intelligent under standing of the calculations are presented in a clear and simple manner. Emphasis is laid upon the fact that all relationships in chemistry are quantitative, and means are provided for the solution of problems commonly met in general chemistry. It has been deemed advisable to call attention to the typical and characteristic reactions of the chemistry of the home, of the laboratory, and of industry. The data provided in the tables have been collected from standard works of reference.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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 San Fernando, California, Earthquake of 9 February 1971The southwestern, eastern, and extreme north eastern parts of the range contain meta sedimentary rocks that were extensively converted to gneiss and migmatite during intrusion Of Mesozoic granitic rocks. These rocks are in fault contact with rocks in the interior of the range.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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 Forestry in MinnesotaThe drawings, with few exceptions, have been made under my direction by Miss M. M. Cheney. The half-tone illustrations are mostly from photographs taken in the division of Horticulture at various times. The figure of a fire break on the Grande Dune, is from a print loaned me by Mr.John Gifford, of Princeton, New Jersey, and that of cut-over timber land, by Mr. H. B. Ayres.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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 The Mosaic Account of Creation, the Miracle of to-Day

Excerpt from Manure Piles and Feed Lots as Sources of European Corn Borer ReinfestationThe fact that conditions existing. In Silos resulted in the destruction of all corn borer larvae put therein, led to the suggestion that Similar results mightbe obtained by mixing infested material with manure. This would have been a very simple means of disposal, and, with the possible exception of removing plant remnants from the surface of piles, it would have involved no extra labor on the part of the farmer. Preliminary experiments, however, indicated that the number of larvae escaping from farm manure piles would prohibit the use of such piles as a control measure.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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 High School ArithmeticThe greater portion of the following work, under the title of Elementary and Practical Arithmetic, was published about two years ago, and has met with the most gratifying reception from eminent Teachers wherever it has become known.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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 Hints and Notes, Practical and Scientific for Travellers in the Alps, Being a Revision of the General Introduction to the Alpine GuideAs high mountain countries, and the Alps in particular, abound with phenomena new and striking to the intelligent Observer, there is a constant increase in the number of those who, without under taking systematic research, are led to desire further information respecting the structure of the earths surface, and the causes that have uplifted the mountain ranges, or the laws that regulate the cir culation of heat and moisture, which maintain what may be called the inanimate life of our planet, or the animal and vegetable forms that exhibit in apparently inhospitable regions so rich a variety.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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 Contribution à lÉtude de lAtrophie Musculaire Progressive

Excerpt from Reports of the Scientific Results of the Expedition to the Eastern Tropical Pacific, in Charge of Alexander Agassiz, by the U. S. Fish Commission Steamer Albatross, From October, 1904 to March, 1905, Lieut. Commander L. M. Garrett, U. S. N. Commanding, Vol. 16

Excerpt from Standard School Physiology Hygiene AnatomyPhysiology has two great practical applications

Excerpt from Experimental Studies With Muscicides and Other Fly-Destroying AgenciesIn the general public health campaign for the eradication of the y, not the least important Of the many destructive measures avail able are those capable of being employed within the household. These constitute in a measure the last line of defense andare aimed against those ies, relatively few in number, which have escaped such general public measures as the elimination of breeding places and that most important individual measure, effective screening. Even when most successful these measures have not heretofore given entire protection, and it has been necessary to supplement them with one or another form of destruction within the household itself.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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 Practical Physiological Chemistry

Excerpt from Bulletin of the United States Museum, Vol. 38

Excerpt from The Agricultural Gazette of Canada, Vol. 9

Excerpt from The Agricultural Gazette of Canada, Vol. 10