276 ROCHESTER ACADEMY OF SCIENCE 



tennial Exposition. About two years later he met Professor Henry 

 A. Ward, who appreciating his skill, induced him to come to Roch- 

 ester; and until his death, June 15, 1904, he was continuously in 

 the Ward's Establishment. Professor Ward is quoted by Charles 

 H. Ward as saying that Preston was the most proficient man he 

 had ever known in the instant identification of minerals and rocks. 



Preston was active in the Academy from 1889 until near the time 

 of his death. He was Secretary of the short-lived Section of 

 Geology in 1889-1891 ; and was one of the Council in 1891 and 

 1893. 



Preston's published writings related to meteorites. Volumes 2, 

 3 and 4 of the Academy Proceedings contain four papers ; one 

 being the description of a new and excellent method for etching 

 iron meteorites so as to display their crystalline structure. The 

 two later papers were also printed in the Journal of Geology, Vol- 

 ume 4. Five papers were published in the American Journal of 

 Science, volumes 5 and 9, between 1898 and 1900. A tenth paper, 

 his last, on a meteorite from Niagara, North Dakota, was printed 

 in the Journal of Geology, volume 10, 1902. 



H. L. Fairchild. 



