ADOLPH LINDENKOHL. 
297 
knowledge had been stored away and how oftentimes he had 
collected facts piecemeal through years of research with a 
definite object in view. He spent much of his leisure time 
in studying the vast physical problems relating to the earth, 
devoting himself especially to physical geography, oceanog¬ 
raphy, and deep-sea temperatures, densities, and currents. 
Numerous articles upon these subjects were written by him 
and have been published as appendices to the Coast and 
Geodetic Survey reports, in Petermann’s Mitteilungen, and 
in the American Journal of Science. He was always much 
interested in geographical exploration and spent a good 
deal of his spare time in compiling maps from original 
sources. Among the most notable results of his researches 
may be mentioned the following: 
Solution of the three-point problem by determining the 
intersection of a side of a given triangle with a line from 
the opposite point to the unknown point. Coast and Geo¬ 
detic Survey Report, 1869. 
Geology of the sea bottom in the approaches to New York 
Bay. Coast and Geodetic Survey Report, 1884. 
Specific gravity of the waters of the Gulf of Mexico and 
the Gulf Stream. Coast and Geodetic Survey Report, 1895, 
and more fully set forth in Peter mann’s Mitteilungen. 
Problems of physiography concerning salinity and tem¬ 
perature of the Pacific Ocean. Coast and Geodetic Survey 
Report, 1898. 
Notes on the model of the Gulf of Maine, constructed for 
the U. S. Fish Commission by A. Lindenkohl. Bulletin of 
the U. S. Fish Commission, vol. m, No. 29, 1883. 
Notes on the submarine channel of the Hudson River 
and other evidences of post-glacial subsidence of the Middle 
Atlantic Coast Region. The American Journal of Science , 
vol. xli, June, 1891. 
Review of the first edition of Zoppritz Leitfaden der 
Kartenentwurfslehre. Science , February 2, 1900. 
In the paper on the Geology of the sea bottom in the ap¬ 
proaches of New York Bay there is suggestion of further facts 
