Un supplément au dictionnaire de figures Arts, Manufactures et Mines, : contenant une présentation claire de leurs principes et de la pratique. . De l'eau. des arts avec la chaux. La chaux. Le sucre. 40-0 21-0 37-5 79-0 1-122 1-179 1-116 1175 20-8 79-2 85-0 20-5 79-5 32-5 1-110 1-166 1-103 M59 20-3 79-7 30-0 20-1 79-9 27-5 1-096 1-148 1-089 1-082 1-139 19-9 80-1 25-0 . 1-128 19-8 80-2 22-5 19-3 80-7 20-0 1-075 1-116 1-068 1-104 1-060 1-092 18-8 81-2 17-5 18-7 81-3 15-0 18-5 81-5 12-5 1-052 1-080 1-04-t 1-067 18-3 81-7 10-0 18-1 81-9 7-5 1-036 1-053 1-027 1-040 1-018 1-026 5-0 16-9 83-1 15-3 84-7 13-8 86-2 2-5 1-014 1009

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A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . arts of water. with lime. Lime. Sugar. 40-0 1-122 1-179 21-0 79-0 37-5 1-116 1175 20-8 79-2 85-0 1-110 1-166 20-5 79-5 32-5 1-103 M59 20-3 79-7 30-0 1-096 1-148 20-1 79-9 27-5 1-089 1-139 19-9 80-1 25-0 1-082 . 1-128 19-8 80-2 22-5 1-075 1-116 19-3 80-7 20-0 1-068 1-104 18-8 81-2 17-5 1-060 1-092 18-7 81-3 15-0 1-052 1-080 18-5 81-5 12-5 1-04-t 1-067 18-3 81-7 10-0 1-036 1-053 18-1 81-9 7-5 1-027 1-040 16-9 83-1 5-0 1-018 1-026 15-3 84-7 2-5 1009 1-014 13-8 86-2 Saccharimetry.—We now come to the estimation of sugar, which is most simply per-formed by the hydrometer, when the solutions are pure and the kind of sugar known. Butcommercially it is required to ascertain the proportions of cane sugar, uncrystaUizable sugar, water and impurities, and this is accomplished most successfully by means of the polarizingsaecharometer proposed by Biot and improved by Solcil. The following is a description ofthis beautiful instrument:—Two tubular parts, t t, and t Tfi(/s. 627 and GiS, constitute. tlie principal part of the s iccharometcr. The light enters v, tln-ough a Xicols prism q, shown separately, fiff. 627, at o, and passes tirst an achromatic polarizing prism p, andshown separately at i and afterwards through a plate of quartz of double rotation at pwhich is also shown at (j. This plate is composed of two semi-discs cut pori)endicularly tothe a.xis of crystallization ; but, though exactly of ccpial thickness and equal rotating power, the one turns the ray to the right, while the other turns it to the left. At y/, the ray passesa plate of quartz of single rotation, and at / l two wedges of quartz endued with the i)owerof rotation, but in a contrary direction to the preceding plate. These two wedges are againrepresented in a, and arc so made that by turning the milled head n, the sum of their thick-ness can be increased or diminished at ple

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• bookcentury1800
• bookdecade1860
• bookpublishernewyo
• bookyear1864