of Edinburgh, Session 1881-82. 
719 
II. “Bottom Water, No. 33; 17th August 1880. Depth, 540 
fathoms.” 
III. “Bottom Water, No. 26; 4th August, 1880. Depth, 460 
fathoms. Rona-Faroe.” 
IV. “Bottom Water; sounding No. 11; 28th July 1880. 
Depth, 270 fathoms.” 
V. “ Bottom Water ; 27th July 1880, Depth, 560 fathoms.” 
Supplementary label : — “ This bottle was broken.” 
In the following statement of the results, Vo means the volume in 
cubic centimetres (reduced to 0° C., and 760 millimetres, and absolute 
dryness), of the total gas extracted from one litre of water. vo 
means the volume in cubic centimetres of the nitrogen and oxygen 
contained in those Vo c.c. of total gas, similarly reduced. So that 
Vo - vo represents the carbonic acid (in cubic centimetres and reduced 
as above) per litre of water. 
I. 
II. 
III. 
IV. 
V. 
Vo, ... . 
24-49 
25-47 
18-77 
20-08 
22-12 
vo, .... 
Per cents, of C0 o in Vo, 
13-92 
14-80 
13-74 
15-95 
14*40 
43-10 
41-88 
26-80 
20-59 
34-88 
Per cents, of 0 2 in vo, . 
32-01 
32-28 
34-23 
35*55* 
32-88 
* This number is very high ; possibly it may be infected with an unobserved 
error. Unfortunately there was not enough of material to repeat either the 
boiling out or the analysis of the gas resulting from the one boiling. 
(Signed) W. Dittmar. 
Note . — The percentages of C0 2 are rather high. The percentages 
of oxygen (in the gas freed from C0 2 ) are decidedly higher than 
those obtained for the “ Challenger ” waters from similar depths. 
The high percentage of oxygen is owing probably to the relatively 
low values of the temperatures at which the waters originally absorbed 
their air, and the relative absence at their respective situations of 
decaying organic matter. 
May 11, 1882. 
W. D. 
