Kidney diseases, urinary deposits, and calculous disorders : their nature and treatment . Fig. Flask adapted for the estimation of carbonic acid gas, used in determining the proportion of sugar in fluids by tt - - (To face page DR. GARRODS METHOD. 253 and red. Now, the exact degree at which the colour passes from theviolet to the red is to be noted ; and the number will vary accordingto the quantity of sugar. The value of each degree is ascertained byexamining in the first instance a few solutions having known quantitiesof sugar dissolved. Supposing that 50 grains of sugar, dissolved in ac
Kidney diseases, urinary deposits, and calculous disorders : their nature and treatment . Fig. Flask adapted for the estimation of carbonic acid gas, used in determining the proportion of sugar in fluids by tt - - (To face page DR. GARRODS METHOD. 253 and red. Now, the exact degree at which the colour passes from theviolet to the red is to be noted ; and the number will vary accordingto the quantity of sugar. The value of each degree is ascertained byexamining in the first instance a few solutions having known quantitiesof sugar dissolved. Supposing that 50 grains of sugar, dissolved in acertain quantity of water, require a rotation of 20°, 100 grains in thesame quantity of fluid will require a rotation of 400 before the violetcolour would appear. This method is very simple and accurate. M. Clerget (Annales de Chimie, iii, XXVI, 175) used Soleilsinstrument, which was also employed by Dr. Bence Jones for deter-mining the quantity of sugar in wines and in diabetic urine. ( and Gazette, vol. XXV, 1852, p. 102.) The apparatus consistsof a polariser and an analyser, made
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