368 The Botanical Gazette. [August, 
Here was formed that intimacy and friendship between two 
kindred natures which continued without interruption until 
the death of Dr. Gray, and which led him to dedicate to his 
revered instructor and friend, his magnificent work on ‘‘The 
Ferns of the United States of America and British North 
American Possessions,” published in 1879-80. 
In 1860 Prof. Eaton received the degree of bachelor of 
science from Harvard, and in 1864 he was elected professor 
of botany at Yale, with duties chiefly in the Sheffield Scien- 
tific School, where he remained until his death. 
Previous to this time he had published papers on the ferns 
of Japan, and eastern Cuba, and contributed the chapter on 
Filices to Chapman's ‘‘Flora of the southern United States.” 
During the thirty-one years of his professorship at Yale he 
published more than sixty papers, mostly on the ferns, 
mosses and alge, with an occasional diversion, as in his 
‘‘Vegetable fibres in an oriole’s nest;” ‘‘Tea, coffee, and 
chocolate; their nature and their effects;” and his botanical 
definitions in Webster’s ‘International dictionary.” 
In 1867 he elaborated the ferns for the fifth edition of 
longitude, and south of the 40th degree of north latitude, 
lished in two volumes under the direction of Sereno Watson. 
One of the writer’s botanical treasures is a nearly complete 
