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. 1906 Excerpt: ...space. Again the juice is emulsioned with the vapour it gives off and this has a tendency to diminish the density of the boiling juice. Now to obtain an idea of the volume of the contained vapour, reference can be made to an article by Dessin in the Journal dcs FabricanU de Sucre. He recalls the phenomenon observed ...
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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. 1906 Excerpt: ...space. Again the juice is emulsioned with the vapour it gives off and this has a tendency to diminish the density of the boiling juice. Now to obtain an idea of the volume of the contained vapour, reference can be made to an article by Dessin in the Journal dcs FabricanU de Sucre. He recalls the phenomenon observed when an evaporator stops boiling, namely, that the level of the liquid falls. This fall in level, which is of the order of three inches, Dessin takes as giving the volume of the contained vapour. Take the case of the third body of a triple, the vacuum being 25 in., the vessel 6 ft. internal diameter, the tubes 4 ft. long, 2 in. diameter, and 630 in number. The total volume of the juice is the volume of the tubes-f-the volume above the tube plate--the volume occupied by the vapour. We have, then, at rest c. ft. Vol. of the tubes = 630 r (TV X Tt X 4) c. ft. = 55-0 Vol. above tube plate = w x 3 X 3 X Jc. ft. = 14-1 69-1 During ebullition the total volume is that found above + that occupied by vapour = ir X 3 X 3 X i c. ft. = 7-0 c. ft. The total volume during ebullition is then 76-l c. ft. The finally corrected densities of the juices then appear B01 First vessel, 1-054 X =-957 (6-i Second vessel, 1-106 X--= 1-004 76-1 Third vessel, 1-229 X = 1-116 761 The vapour then in the third vessel will have to raise a column of liquid of mean height 27 in., and of density 1-116; this is equivalent to 2-20 in. of mercury or 1-09 lbs. per square inch. The vapour itself was taken at a pressure of 2-42 lbs. per square inch, so that the pressure of the vapour at the moment of its formation is 2-42-4-1-09 = 3-51 lbs. per square inch, corresponding to a temperature of 147 F., that of the vapour was 132 F.; a difference of 15 F. Similarly for the second body a diffe...
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Seller's Description:
Good. 8vo. viii, 396, xix pp, ads, index, addendum, line drawings, 9 col plates, 2 bw plates. Or blue cloth. Front hinge starting, a little foxing, some minor flecking to cloth. All aspects of growing sugar cane and the extraction of sugar are covered.
