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. 1911 Excerpt: ...portions and reference to Fig. 28 may serve somewhat to make these portions clear. We have the wick surrounded by a blue portion, which gradually merges into a darker region; and this region, at about one-third the height of the flame, shades off fairly abruptly into a yellow portion, the region of greatest luminosity. ...
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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. 1911 Excerpt: ...portions and reference to Fig. 28 may serve somewhat to make these portions clear. We have the wick surrounded by a blue portion, which gradually merges into a darker region; and this region, at about one-third the height of the flame, shades off fairly abruptly into a yellow portion, the region of greatest luminosity. A close observation also reveals a faintly luminous mantle surmounting the whole flame, although this is often missed in a casual glance. It is quite natural to suppose, therefore, that these different appearances arise from definite causes, and it is our desire to find these causes for the varying effects. Let us introduce one end of an open straight glass tube into the dark portion (Fig. 29). If care be exercised, a light may be obtained at the other end of the tube; combustion proceeds, showing that gases still capable of being burnt exist in this portion of the flame. In all probability, this dark portion is a zone where no true combustion is proceeding, the hollow space being filled by vapours formed by the mere effect of heat upon the wax--gases whose combustible portions will be burnt on their ascent up the flame. Let us now examine the yellow or luminous portion of the flame. On introducing into the flame a piece of white porcelain, it is at once coated with soot, which is really carbon in very fine powder. Hence on momentarily cooling the luminous area of the flame, carbon is deposited. It is now generally supposed that the luminosity is due to particles of this carbon, disseminated in a free and hot condition in the flame. They shine because they are very hot--so hot as to be incandescent. It was suggested, some years ago, that the luminosity was due to the vapours of dense hydrocarbons in an incandescent state; but we may take it n...
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Add this copy of The Story of the Five Elements to cart. $19.72, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of The Story of the Five Elements to cart. $29.16, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of The Story of the Five Elements to cart. $31.71, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
Add this copy of The Story of the Five Elements, (on Cover: the Library to cart. $126.92, very good condition, Sold by Lexington Books rated 5.0 out of 5 stars, ships from Idaho Falls, ID, UNITED STATES, published 1911 by Cassell and Co.
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Seller's Description:
Very Good. Good+; Contents are tight and clean; moderate wear/chipping to ends of spine; the edges of a few pages show bumping; Ex-Library; Hard Cover; Cassell and Company; 1911; 0.
