Atomic Volume and Specific Gravity, 479 



pendent of their water of crystallization, even when they con- 

 tain water, and yet the most interesting result follows, that the 

 same divisor, 9, continues for the volumes ascertained by ex- 

 periment. The volumes in solution of the salts examined, 

 allowing for errors of observation, are therefore always mul- 

 tiples of 9, — the atomic volume of water. The volumes of 

 the solids are, like those of the previous section, multiples of 

 one and the same number, that number being also, as in the 

 former case, 1 1 ; but the ammonia salts do not arrange them- 

 selves under this divisor for reasons which will be explained 

 presently. The averages of the experiments on all the salts 

 are thrown into the following table, into which is also in- 

 troduced the exact numbers which would have resulted had 

 there been a strict accordance with the law obviously indicated 

 by experiment. 



Table VI. — Showing the volumes of certain Sulphates with a small pro- 

 portion of Water of Hydration, Anhydrous and Double Sulphates. 



Designation. 



Volume in 

 solution. 



Volume in state of salt. 



Name. 



Sulphate of potash . . 

 Bisulphate of potash. 

 Sulphate of ammonia 

 Bisulphate of am- \ 



monia j" 



Bisulphate of soda... 

 Ammoniacal sul- 1 



phate of copper J 

 Sulphate of copper"! 



and potash J 



Sulphate of copper 1 



and ammonia... f 

 Sulphate of zinc 1 



and poteish j 



Sulphate of zinc \ 



and ammonia... j 

 Sulphate of mag-1 



nesia and potash J 

 Sulphate of mag- \ 



nesia & ammonia j 

 Sulphate of iron 1 



and potash J 



Sulphate of iron 1 



and ammonia ... J 

 Sulpiiate of nickel "1 



and potash J 



Formula. 



KO, SO3 



KO, SO3+IIO, SO3 



NII4O, SO3+HO 



NH4O, SO3+HO, SO3 



NaO, SO3+HO, SO3 



CuO, SO3HO+2NH3 



CuO, SO3 + KOSO3 \ 



+6II0 J 



CuO, SO3 + NH^O, 1 



SO3 + 6H0 J 



ZnO, SO34-KO, 803! 



+CHO J 



ZuO,S03+NH40,S03l 



+ 6H0 J 



MgO,S03 + KO, SOgl 



+ 6110 J 



MgO, S03 + NH40,\ 



SO3 + 6HO ]■ 



FeO, SO3 + KO, SOgl 



+ 6H0 J 



FeO,S03+NH40S03l 



+ 6H0 / 



NiO, SO3 + KO, SO3I 



+ 6 HO / 



Atomic 

 weight. 



a " 

 3 1? 



4) .■5 

 3 -^ 



.0 01 * 



87-25 



136-35 



75-25 



11535 



120-64 



12300 



221-31 



199-88 



221-86 



20000 



202-29 



181-12 



216-73 



195-55 



218-99 



180 i 2 

 3605! 4 



36-0 

 46-0 

 18-6 

 52-6 



720 



810 



720 



80-0 



72-0 



80-2 



720 



80-7 



71-5 



33-05 



551 



43-0 



65-5 



440 



68-7 



98-6 

 105-7 



98-8 

 105 4 



97-4 

 105-2 



98-4 

 105-8 

 1000 



o s 



> s 

 t ^ . 



3J3 ^ 



^ S (J! 



&8 



sg- 



2-644 2-640 

 2-479|2-475 

 1-7101-750 



1-7471-761 



2-742.2-742 

 1-790 



2-235 2-244 



2-019 

 2-241 

 2020 

 2-043 

 1-829 

 2-190 

 1-975 

 2-212 



1-891 

 2-245 

 1-897 

 2-076 

 1-721 

 2-202 

 1-848 

 2-190 



