CONTENTS. 
I. The Principal Saline Components, 
Determination of tlie Chlorine, .... 
„ „ Sulphuric acid, 
,, „ Lime and Magnesia, 
„ ,, Potash [Supplementary work, page 233], 
,, ,, Soda, .... 
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1 
4 
8 
9 
12 
17 
Table T. Showing the quantities of the Principal Saline Components present in a series 
of Challenger Samples, ...... .23 
IL On the Salinity of Ocean-Water, ....... 39 
Table I. Giving the permilleages of Chlorine (x) found in a series of Challenger 
Waters, ........ 43 
Table II. Experiments to determine the dependence of Specific Gravity on Salinity 
and Temperature, . . . . . . .57 
Table III. Giving the Relative V olumes of Sea-Water according to various Observers, 62 
Table IV. Referring to a Sea-Water of the Salinity of E /arum’s “ D,” . . 63 
Table V. Giving the Specific Gravities, 4 @ t , of 11 Standard Sea-Water" at t°, . 65 
Reduction of the Specific Gravities to the Vacuum, ..... 66 
Table VI. Giving the correction for finding the Specific Gravity in reference to pure 
Water of T° from the Specific Gravity given in reference to pure 
water of t°, . . . . . . . .69 
Table VII. To find the Specific Gravity at t° from the Specific Gravity at 
15°-56, ....... 70 
Table VIII. To find x from a given Specific Gravity, ... 78 
Table IX. To find x, from a given Specific Gravity at 15° -56, ... 80 
Table X. To find the Specific Gravity at 15°'56 from y, . . . .81 
Table Xa. To find the Chlorine per litre [x] from the Chlorine per kilo, x, • 81 
The Hydrometer Error, . . . . . . • • .82 
Table XI. Classification of the Observational Errors in Buchanan’s Values x\ • 8/ 
III. The Bromine in Ocean-Water, 
Attempts to determine the Minimum of Silver required for precipitating the Eromine from 
1 Litre of Sea- Water, ....•••• 
(phys. chem. chall. exp. — part i. — 1S84.) A 32 
89 
93 
-4 
«. 4 
44 . 
A 32 
