REPORT ON THE COMPOSITION OF OCEAN-WATER. 
177 
By means of these two tables I was enabled to re-calculate the results of Mr. 
Buchanan’s and my own analyses of the gas extracted from sea- water, so as to bring them 
into a more convenient form for interpretation. The results of my calculations are 
embodied in the following tables 
In Table XI. for the Surface-Waters Column I. gives the number assigned to the 
respective sample of water by Mr. Buchanan. 
Column II. names the Station at which the water was collected. The symbol + 
attached to a number means that the water was collected shortly after passing the 
Station ; the sign — shortly before arriving at it. 
Column III. gives the temperature t 0 of the water when collected ; the numbers 
are transcribed from Mr. Buchanan’s printed report on the specific gravities. 
Columns IY. and Y. give, the former the nitrogen, the latter the oxygen, gas found per 
litre of water analysed, in cubic centimetres reduced to 0° C. and 760 mm. dry pressure. 
Columns YI. and VII. give the volumes of nitrogen and oxygen which the water, at 
t 0 °, according to my determinations, would take up if fully saturated by exposure to an 
infinitely great volume of air at 760 mm. dry pressure. 
7X 
Column VIII. (as IV. x — ) gives the volume of oxygen which, according to my ex- 
n 2 
periments, should be present along with the volume of nitrogen recorded in Column IV. 
as having been found. This volume of oxygen is in general greater than that of the 
oxygen brought out by analysis. 
Column IX. gives the difference between the amount of oxygen obtained by calcula- 
tion and that found by the analysis, i.e., the value of entry in Column VIII. minus 
entry in Column V. 
Table XII. is devoted to the “ intermediate waters,” meaning waters neither sur- 
face nor bottom waters. They are arranged in the order of the depths (8) at which the 
samples were taken. The entries in Columns I. and II. have the same meaning as in 
Table XI. 
Column III. under D gives the depth of the sea at the respective place. 
Column IV. the depth (8) at which the sample of water was taken. 
Column V., under t 0 , the natural temperature of the water when the sample was col- 
lected. (Taken from Mr. Buchanan’s specific gravity tables.) 
Columns VI. and VII. give the volumes of nitrogen and oxygen found per litre of 
water, reduced to 0° and 760 mm. of dry-gas pressure. 
Column VIII. gives the temperature t x at which one litre of sea- water, according to 
my experiments, would take up the volume of nitrogen found (Column VI.) from pure 
air of 760 mm. dry pressure. 
Column IX., under (0 2 )i, gives the volume of oxygen which, according to my experi- 
ments, would be present along with the nitrogen found (Column I.) in water fully 
(PHYS. CHEM. CHALL. EXP. — PART I. — 1884.) A 23 
if 
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