12(5 



Mr. J. J. Hood on the Law, 



Table II. 



Temp. 

 C. 



a. 



b. 



Means. 



Amount 



of 

 H 2 S0 4 . 



Ratios. 



a. j b. 



a' : a. 



b':b. 



Acid. 



9°-l 



• f 



12° \ 



I 

 ( 



10°-9<i 



l 



( 



\ 



( 



10°-8< 



381 



388 

 601-7 

 6056 

 293-6 

 294 

 370-5 

 365-8 

 253-3 

 250 

 324-4 

 324-9 

 211-2 

 212 

 1693 

 166-4 

 316-5 

 321-5 

 134-5 

 138-5 

 114-3 

 114-4 

 327 

 331-7 

 102-6 

 101-8 

 77-2 

 78-2 



3731 



3816 

 5945 

 5992 

 2870-3 

 2895 

 3651-8 

 3590 

 2480 

 2444-7 

 3184-4 

 3198-8 

 2039-6 

 2056-3 

 1632-8 

 1599-6 

 3115-5 

 3167-7 

 1300-3 

 1333-5 

 1090-7 

 1091 

 3246 

 3266 

 971-2 

 964-8 

 721-9 

 726-9 



334-5 

 603-6 

 293-8 

 368-1 

 251-6 

 324-6 

 211-6 

 167-8 

 319 

 136-5 

 114-3 

 329-3 

 102-2 

 77-7 



3773-5 

 5968-5 

 2882-6 

 3620-9 

 2462-3 

 3191-6 

 2047 9 

 1616-2 

 3141-6 

 1316-9 

 1090-8 



325-6 



968 



724-4 



grams. 

 5 



j> 

 3 



5 



4 



6 



5 

 8 



ib 



5 

 12 



14 

 5 

 10 

 20 



•637 



•798 

 1-168 

 1-534 

 1934 

 2-338 

 2-791 

 3-222 

 4-238 



•632 



•796 

 1171 

 1-558 

 1-974 

 2-385 

 2-880 

 3-363 

 4-494 



•600 



•800 

 1-200 

 1-600 

 2-000 

 2-400 

 2-800 

 3-200 

 400 



Somewhat similar results have been obtained from various 

 chemical reactions. Harcourt and Esson investigated the 

 influence of hydric sulphate on the rate of change when oxalic 

 acid is decomposed by potassic permanganate*, and when 

 hydric iodide is decomposed by hydric peroxide t; and they 

 found that the rate of change depended on the acidity of the 

 solutions. So also Boguski and Kajanderf, in their experi- 

 ments on the evolution of carbonic dioxide from marble, found 

 that the rate at which the gas was given off was proportional 

 to the concentration of the acid. 



Effect of Hydric Chloride. 

 A series of experiments were made to find how much hydric 

 chloride was required to substitute a given weight of hydric 



* l'hil. Trans. 18G0. 



t Ber. deut. cliem. Ges. 1877, p. 34. 



t rhil. Trans. 1807 



