219 
1906-7.] On the Application of a Differential Densimeter. 
If we compare the values set forth in Tables III. and IV., it will be at 
once apparent that the simpler method of calculating the density yields 
results which, in point of accuracy, are probably amply sufficient to meet 
the demands made by oceanographers. All the values for A 18 o C . given in 
Tables V. and VI. were calculated by this method. 
In Table V. are given the densities of thirty samples of sea- water as 
determined with the aid of the densimeter having the form described 
above ; side by side with these, the corresponding pyknometer values 
are also noted. 
Table V. — Densities, etc., of Waters collected between 
Cape St Vincent and Cape Palos, July 1905. 
p-l 
CD 
c3 
Ajg by 
00 
< 
Grams 
of Cl 
per litre. 
1 
ti-i 
O 
o' 
the 
pykno- 
meter. 
the 
densi- 
meter. 
Differ- 
ence. 
4th July. 
Position of Ship. 
1. 
1-0276 
1-0276 
± -oooo 
20-651 
5 p.m. 
2. 
7 
7 
± 0 
•651 
6 M 
3. 
8 
7 
1 
•756 
7 M 
4. 
9 
6 
3 
•686 
8 m 
5. 
8 
8 
± 0 
•756 
9 n 
6. 
9 
8 
1 
•756 
10 H 
7. 
8 
8 
± 0 
•756 
11 ,i 
8. 
7 
4 
3 
•615 
Midnight. 
5 th July. 
Off Trafalgar. 
9. 
7 
6 
1 
•615 
1 a.m. 
10. 
8 
6 
2 
•721 
2 M 
Off Tarifa Pt., 5th July, 4.42 a.m. 
11. 
9 
7 
- 2 
•721 
3 ,i 
12. 
13. 
9 
1-0285 
7 
1-0285 
2 
± 0 
•721 
21-215 
4 ,, 
11 H 
| Off Carnero Light, 5.27 a.m. 
14. 
4 
3 
1 
•144 
Noon. 
15. 
1-0279 
1-0278 
1 
20-792 
1 p.m. 
16. 
9 
9 
± 0 
•792 
2 M 
17. 
8 
7 
1 
•756 
3 „ 
18. 
1-0282 
1-0280 
2 
•968 
4 M 
19. 
2 
2 
± 0 
21-004 
5 i, 
20. 
7 
Omitted. 
•604 
6 ii 
21. 
9 
1-0286 
3 
•533 
7 
22. 
9 
8 
1 
•533 
8 H 
23. 
9 
9 
± 0 
•533 
9 ii 
24. 
1-0299 
1-0298 
1 
22-310 
10 
25. 
93 
93 
± 0 
21-780 
11 ,, 
26. 
92 
89 
3 
•674 
Midnight. 
6 th July 
27. 
91 
91 
± 0 
•674 
1 a.m. 
28. 
1-0309 
1-0307 
2 
22-857 
2 „ 
29. 
1-0317 
Omitted. 
23-686 
3 ii 
30. 
9 
II 
•686 
4 „ 
Off Cape Palos, 6th July, 4 a.m. 
Mean diff. 
= - -0001 
