302 
MESSRS. THOMAS MARTIN LOWRY AND PERCY CORLETT AUSTIN 
Table XIII.—Constants of Drude’s Equation. 
K 
h. 
\ 2 
4 * 
A+ 
Sodium tartrate— 
(a) 25-72 grams in 100 c.c. . . . 
37-445 
18-025 
0-038 
0-060 
( b ) 41-97 grams in 100 c.c. . . . 
37-108 
18-348 
0-038 
0-060 
Potassium tartrate— 
(a) 41-647 grams in 100 c.c. . . 
41-750 
19-255 
0-038 
0-060 
(b) 40-255 grams in 100 c.c. . . 
Rochelle salt—• 
41-108 
18-886 
0-038 
0-060 
55-93 grams in 100 c.c. 
38-513 
18-066 
0-038 
0-060 
Ammonium tartrate— 
37-075 grains in 100 c.c. . . . 
38-676 
17-117 
0-038 
0-060 
Table XIV.—Rotatory Dispersion of Potassium and Sodium Tartrates at 20° C. in 
presence of an excess of Alkali. 
(a) 2 • 6 gr. of potassium tartrate 
+36-43 gr. of potassium oxide (K 2 0) 
in 90-32 gr. of aqueous solution, or 
4-329 gr. potassium tartrate in 100 c.c. 
Length of tube = 6 dm. 
Density — 1 • 504. 
A. 
a. 
[M], 
Cd 6438 
-0-29 
— 2-62 
Na 5893 
-0-30 
- 2-71 
Hg 5780 
-0-30 
- 2-71 
Hg 5461 
-0-41 
- 3-71 
Cd 5086 
-0-61 
- 5-52 
Cd 4800 
-0-80 
- 7-24 
Cd 4678 
-0-99 
- 8-96 
Hg 4358 
-1-34 
-12-12 
(b) 13-3 gr. of sodium tartrate +20 • 41 gr. 
of sodium oxide (Xa 3 0) in 92-891 gr. 
of aqueous solution, or 
20-178 gr. sodium tartrate in 100 c.c. 
Length of tube — 6 dm. 
Density = 
= 1-4093. 
a. 
[M], | 
- 7-54 
-14-32 
-10-09 
— 19-17 
-11-87 
-22-55 
-14-61 
-27-75 
—17-43 
-33-11 
—18-87 
-35-85 
-24-29 
—46-14 
