8. DIELECTRIC CONSTANTS, FACTOR OF ASSOCIATION, HEAT OF EVAPORATION, AND MOLECULAR SURFACE TENSION OF LIQUIDS. (WALDEN AND CENTNERSCHWER, Zeitschr. phys. Chem., 39. (561).

9. CALIBRATION BY WATER OR MERCURY (KOHLRAUSCH). When a glass vessel at temperature t is weighed in air with brass weights, and appears to hold w grams of water or g of mercury, its volume at 18° is w (1 + 8) or qk cub. cms. The volume expansion of glass is taken as o'000025.

0000164 0'073583 10 000153 0073698 20 0'00278 0.073813 I 0.00156 0.073595 11 000160 0.073710 21 000297 0073825 2 0.00150 0073606 12 000169 0073721 22 000317 0.073836 3 000145 0073618 13 000178 0073733 23 0.00338 0.073848 4 0'00142 0073629 14 000189 0073744 24 000360 0073860 5 000140 0073641 15 000201 0073756 25 000383 0073871

0'00140 0.073652 16 000214 0073767 26 000407 0073882 7 000141 0'073664 17 000229 0073779 27 000431 0.073894 8 000143 0073675 18 000244 0'073790 28 0'00457 0073905 90'00147 0073687 19 0'00260 0'073802 29 0.00484 0073917 10 000153 0073698 20 000278 0.073813 30 000512 0073928

IO. ELECTROMOTIVE FORCE OF STANDARD Cells (Jaeger).

The above numbers refer to the cadmium cell with saturated electrolyte; the Weston cell is 1'0190 volt at all temperatures.

II. ELECTRO-AFFINITY OF IONS (see p. 159).

12. EXCESS POTENTIALS IN ELECTROLYTES (see p. 176). 13. TEMPERATURE CO-EFFICIENTS OF ELECTRODE POTENTIALS (see p. 202).

14. HEATS OF IONISATION (see p. 204).