127 
and Prof. W. H. Brewer, appeared in 1876, followed in 1880 by 
Vol. II., published by Dr. Watson. The two volumes contain 
nearly twelve hundred pages, and are a monument to the authors. 
Dr. Watson assisted in writing the botanical portion of the Cen- 
tury Dictionary in the earlier numbers of the work. He contrib- 
uted also to many scientific journals, the BULLETIN containing 
many of his papers. He was a warm friend of the late Leo Les- 
quereux, bryologist, and, on the death of Mr. Thomas P. James, 
with whom Lesquereux was publishing a Manual of the Mosses 
of North America, Dr. Watson undertook to complete the pub- 
lication of the work, owing to Lesquereux’s failing health, and 
he issued the volume in 1884. In 1889, he published, in connec- 
tion with Prof. J. M. Coulter, the Sixth Edition of the Gray 
Manual of the Botany of the Northern United States. This work 
was eagerly looked forward to, and joyfully welcomed by all stu- 
dents of the flora of the Northeastern United States, for the last 
edition had been published as far back as 1867. The western 
range of the old Manual is extended in this edition to the one 
hundredth meridian, in order to connect it with the Manual of the 
Rocky Mountain Region, by Prof. Coulter. A second issue of 
this work has already appeared. 
Dr. Watson was a member of many scientific societies at home 
and abroad, and from Iowa University he received the degree of 
Ph.D. His career in Cambridge was marked by the most inde- 
fatigable work. His connection with the Herbarium involved 
many duties relatin g to the care of the plants under his charge, and 
of the library, and it is a wonder that he was able to accomplish 
so much original work. He rarely took even a short vacation, 
and it was seldom that he was not to be found surrounded by 
his books and herbarium sheets in the familiar room, sanctified 
for so many years by the presence of Dr. Asa Gray. To Dr. 
Watson most befittingly it fell to carry on the Synoptical Flora o 
North America, which it is the earnest wish of every botanist to 
‘ee carefully completed. He had worked harmoniously so long 
With Dr, Gray, that he thoroughly understood the plan on which 
the great Flora was to be continued. Unfortunately he did not 
live to do much in this direction. : 
During the last two years of his life, he used Dr. Gray’s study, 
