REPORT ON THE COMPOSITION OF OCEAN-WATER. 
90 
I. Surface Waters. 
Analysis. 
Milligrammes of Bromine per kilogram of Sea-water. 
I. Precip. 
II. Precip. 
Total. 
No. 1, 
6346 
4-32 
67-48* 
„ 2, 
62-93 
4-68 
67-611 
„ 3, . . • 
lost. 
4-50 
„ 4, 
62-98 
3-42 
66-40 
„ 5, 
62-90 
3-78 
66-68 
Means, 
62-99 
4-14 
67-04 
•f '0 ~ 
±0-039 
±0-20 
Chlorine per kilogram found=19 - 634 and 19"653 grms. ; mean, 19'644; hence 
bromine per 100 parts of ehlorine = 0'3394±0 , 001. 
II. Medium-Depth Waters. 
Milligrammes of Bromine per kilogram of Sea-water. 
Analysis. 
I. Precip. 
II. Precip. 
Total. 
No. 1, 
62-32 
444 
66-46 
„ 2, 
62-55 
2-88 
65-43 
„ 3, 
62-37 
3-24 
65-61 
„ 4, 
62-03 
3-24 
65-27 
Mean, . 
62-32 
3-38 
65-69 
r 0 = 
±0-073 
±0-18 
Chlorine per kilogram 19-332 and 19-331 grms. ; hence bromine per 100 of chlorine 
= 0-3414 ±0-000 93. 
* Third precipitate gained 0T mgrm. on chlorination. 
+ Third precipitate gained 0 - 3 mgrm. on chlorination. 
f \2 
+ r 0 = probable error of mean = 0-6745 * -*o being t]ie deviation of the indiridua! result from the mean. 
