REPORT ON THE COMPOSITION OF OCEAN-WATER. 
107 
In the course of this memoir I had occasion to acknowledge the services of Messrs. 
John M‘ Arthur, Robert Lennox, Thomas Barbour, and W. G. Johnston. In addition to 
these gentlemen, I must now thank Messrs. James M. Bowie, James B. M‘ Arthur, G. A. 
Darling, and Moses T. Buchanan, for having assisted me in my analytical Challenger 
work. The last-named young chemist indeed has the credit of having borne the burden 
of the work involved in those numerous analyses of fossils, bones, and oceanic deposits 
which are recorded under my name in other volumes of this publication. 
In conclusion, I have to record my grateful appreciation of the ready furtherance 
always accorded to me by the Editorial Department, and, in addition, to express my 
obligations to my friend Mr. George Cranston for the untiring way in which he, at great 
inconvenience to himself, aided me in correcting the proof sheets of this memoir. 
