This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 Excerpt: ...two arms, and means of connecting the conductors which are to form the x and E circuits of the diagram of Figure 21. They may be looked upon as designed only for comparing two resistances, viz. the two that form the x and B circuits, and not for determining the absolute value of either. Of course if one of the ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 Excerpt: ...two arms, and means of connecting the conductors which are to form the x and E circuits of the diagram of Figure 21. They may be looked upon as designed only for comparing two resistances, viz. the two that form the x and B circuits, and not for determining the absolute value of either. Of course if one of the resistances is known in terms of the standard unit, this instrument gives the measure of the other, but no standard coils form an essential part of the design. They are analogous to ordinary balances, which are machines for comparing two masses, as contrasted with a spring balance or steelyard which give in pounds the mass of a body weighed. The construction of almost all standards of physical quantities depends on the continued copying, and aggregation of copies, of a single unit, and requires some means of closely comparing such copies with one another and the original. The arrangements we are describing are peculiarly well adapted for making the comparison between two resistances of nearly the same value, and are almost universally employed for the work. 67. For the purpose of description we shall take first the metre bridge, which presents in a simple form the points of construction and manipulation common to them all. The metre bridge shown in Figs. 30,32 consists of a board about 4 feet long, on which are laid five copper or brass plates numbered 1, 2, 3, 4, 5. Erected on 1 and 5, and soldered to them, are stout pillars between which is stretched a wire of uniform section. A wooden straight-edge, engraved with a scale, is fixed underneath at such a height that the wire lies upon it. The wire may be of exactly the same length as the divided scale. in which case the instrument lends itself---somewhat indifferently--to a more extended application t...
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Add this copy of A Treatise on the Measurement of Electrical Resistance to cart. $28.82, poor condition, Sold by Anybook rated 5.0 out of 5 stars, ships from Lincoln, UNITED KINGDOM, published 1894 by Oxford Clarendon Press.
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Seller's Description:
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. With usual stamps and markings, In poor condition, suitable as a reading copy. No dust jacket. Blind stamping. Gilt lettering on front board. Shelf wear. Bumped corners. Pages detached but still present. Illustrated. Internally clean. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 700grams, ISBN:
