3* 



supplying pure and wholesome water to the seaboard 

 communities of the State. 



Third. The discovery and outlining of the great ter- 

 minal Moraine in the eastern United States, running 

 across New Jersey and the adjacent parts of New York 

 and Pennsylvania. It was announced in a paper read at 

 Wilkesbarre before the American Institute of Mining 

 Engineers in 1877, and described in his annual reports for 

 the years 1877 and 1878. 



Fourth. His determination with exactness of the 

 stratigraphical relations of the clay beds of the State, so 

 important to the fire-clay and potters-clay industries, and 

 of the geological structure of the magnetic ore beds, of 

 special value not only to the iron miner and the iron ore 

 prospector, but to the geologist and the mining engineer. 

 These important contributions were published in the 

 report of 1878 for the clays, and of 1883 for iron ores. 



Fifth. The exhibition by practical application of the 

 value of accurate topographical maps in geological study. 

 Thanks to Doctor Cook, New Jersey is the best mapped 

 State in the Union, and his atlas of New Jersey is recog- 

 nized as a real contribution to the science of geology as 

 well as geography. 



I may not further dwell, nor need I, upon what Doctor 

 Cook achieved as a man of science. I would meiely call 

 attention to two marked traits, intimately connected, 

 which preeminently characterized him as a scientist. 



First. The emphasis he placed on the practical or 

 useful applications of science. This was so strong that 

 nothing in the way of theoretical or speculative science 

 ever diverted him from the single aim of making his 

 scientific knowledge and discoveries useful to his fellow 

 men. He was not without interest in the philosophy of 



