The Dictionary of Arts, Sciences and Manufactures; Embracing in All Nearly Three Thousand Articles on Arts and Sciences Volume 1 PDF Download
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Author: James Smith
Publisher: Rarebooksclub.com
ISBN: 9781230151281
Category :
Languages : en
Pages : 268
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Book Description
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1859 edition. Excerpt: ...of two inches from the same centre; the two weights R and S, though in the proportion of 2 to 1, will balance each other. The pulley. If the weight S were only two ounces, it would produce the same effect upon R, provided its distance from the fulcrum were proportioned to the diminution of its weight; that is, if it were three times as far from the centre c, as R. We have now to shew that the moveable pulley acts like a lever of the second order. Let the moveable pulley A, fig. 4, fl. II, be fixed to the weight W, with which it rises and falls, n comparing it with the lever alluded to, the fulcrum must be considered as at F; the weight acts upon the centre c, by means of the neck ch; the power is applied at D; and the line DF will represent the lever. The power, therefore, .as in fig. 3, is twice as far from the fulcrum as the weight, and the effect in both cases is alike, viz. the proportion between the power and the weight, in order to balance each other, must be as 1 to 2. It is evident, therefore, that the use of this pulley doubles the power, and that it will enable a Mtu to raise twice as much as by his strength alone. Or, as variety in illustration will sometimes catch the attention, and familiarize a subject to some whose ideas of it would not otherwise be distinct, the action of this pulley may be viewed in a light somewhat different from the above. Every moveable pulley may be considered as hanging by two ropes equally stretched, and which must consequently bear equal Earls of the weight; the rope FG being made fast at G, alf the weight is sustained by it, and the other part of the rope, to which the power is applied, has only the other halt of the weight to support; consequently the advantage gained is as 2 to 1. When, as in..
Author: James Smith
Publisher: Rarebooksclub.com
ISBN: 9781230151281
Category :
Languages : en
Pages : 268
Get Book Here
Book Description
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1859 edition. Excerpt: ...of two inches from the same centre; the two weights R and S, though in the proportion of 2 to 1, will balance each other. The pulley. If the weight S were only two ounces, it would produce the same effect upon R, provided its distance from the fulcrum were proportioned to the diminution of its weight; that is, if it were three times as far from the centre c, as R. We have now to shew that the moveable pulley acts like a lever of the second order. Let the moveable pulley A, fig. 4, fl. II, be fixed to the weight W, with which it rises and falls, n comparing it with the lever alluded to, the fulcrum must be considered as at F; the weight acts upon the centre c, by means of the neck ch; the power is applied at D; and the line DF will represent the lever. The power, therefore, .as in fig. 3, is twice as far from the fulcrum as the weight, and the effect in both cases is alike, viz. the proportion between the power and the weight, in order to balance each other, must be as 1 to 2. It is evident, therefore, that the use of this pulley doubles the power, and that it will enable a Mtu to raise twice as much as by his strength alone. Or, as variety in illustration will sometimes catch the attention, and familiarize a subject to some whose ideas of it would not otherwise be distinct, the action of this pulley may be viewed in a light somewhat different from the above. Every moveable pulley may be considered as hanging by two ropes equally stretched, and which must consequently bear equal Earls of the weight; the rope FG being made fast at G, alf the weight is sustained by it, and the other part of the rope, to which the power is applied, has only the other halt of the weight to support; consequently the advantage gained is as 2 to 1. When, as in..
Author: James Author of the Panorama of Smith
Publisher: Wentworth Press
ISBN: 9781361832165
Category : History
Languages : en
Pages : 700
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Book Description
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 was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. 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. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. 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.
Author: James Smith (author of the Panorama of science and art.)
Publisher:
ISBN:
Category : Industrial arts
Languages : en
Pages : 1726
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Book Description
Author: James Smith
Publisher: Arkose Press
ISBN: 9781343670006
Category :
Languages : en
Pages : 920
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Book Description
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 was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.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.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. 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.
Author: James Author of the Panorama of Smith
Publisher: Wentworth Press
ISBN: 9781361830215
Category : History
Languages : en
Pages : 948
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Book Description
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 was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. 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. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. 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.
Author: James Smith (author of the Panorama of science and art.)
Publisher:
ISBN:
Category : Industrial arts
Languages : en
Pages :
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Book Description
Author: James Smith
Publisher: Rarebooksclub.com
ISBN: 9781230192994
Category :
Languages : en
Pages : 360
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Book Description
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1859 edition. Excerpt: ... of its weight of it. It therefore instantly disappears if water be introduced into ajar of it; some caloric is evolved, and the specific gravity of the water is diminished. If ice be introduced into this gas, it melts and absorbs the ammonia, while at the same time its temperature is diminished. The specific gravity of water saturated with ammonia, at 60 is.9054. It is the attraction of water for ammonia, which renders it necessary to employ mercury in obtaining the gasWater combined with ammonia, acquires its smell, and has a disagreeable taste; it converts vegetable blues to green. It is this liquid solution of ammonia which is meant in speaking of the volatile alkali. VVhen heated to the temperature pt 130, the ammonia separates in the form of gas. Whep its temperature is reduced to--46, it crystallizes; and when suddenly cooled down to 68, it assumes the appearance of a thick jelly, and has scarcely any smell. Compound substances--Alkalies.--Ammonia. Ammonia may be obtained by the dry distillation of bones and other animal matters; it is from such substances that it is obtained to supply the demand of commerce, and it is sold under the name of spirits of hartshorn. The product of the first distillation from bones, &c. is very impure; it is therefore improved by repeated distillations. Berthollet's experiments evinced that one thousand parts of ammonia consists of 807 parts of nitrogen, and 193 parts of hydrogen; but Sir H. Dayj having discovered oxygen to' be the alkalizing principle in potass and soda, was convinced of the probability of its existing in ammonia. His researches confirmed this opinion, and he concludes the proportion of oxygen in ammonia to be at least 7 or 8 per cent. He also succeeded in separating from it a...
Author: James Smith
Publisher: Arkose Press
ISBN: 9781344834865
Category :
Languages : en
Pages : 686
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Book Description
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 was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.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.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. 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.
Author: James Smith (author of the Panorama of science and art.)
Publisher:
ISBN:
Category : Industrial arts
Languages : en
Pages : 964
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Book Description
Author: James Smith
Publisher:
ISBN:
Category : Industrial arts
Languages : en
Pages :
Get Book Here
Book Description