2 Rhodora [JANUARY 
was not confined to a single branch of science, but his botanical ac- 
tivities were in many different fields in all of which he worked with a 
thoroughness always characteristic of everything he did. The ex- 
treme versatility of his scientific studies may be shown by a few 
examples. 
In 1882 he published as Series 3, no. 2, of the Houghton Farm 
Experiment Department, ‘Peach Yellows,’ a paper dealing with 
vegetable pathology. In the Ninth Annual Report of the Montreal 
Horticultural Society, published in 1884, appeared his article ‘Notes 
on the trees and shrubs of northern Japan,’ a paper of horticultural 
importance. In May, 1886, the American Naturalist contained his 
observations on ‘Variation in water in trees and shrubs,’ showing 
the hydration of dead wood and of wood from living trees and shrubs, 
the latter case illustrated by studies of seventy-six species, a sub- 
ject within the field of vegetable physiology. In the Canadian 
Record of Science, vol. ii, no. 2, April, 1886, was published ‘ Physical 
Characteristics of the Ainos.’ These tribes occupy “Yezo and the 
Kuriles” and Professor Penhallow says that his experience extended 
over “four years of intimate acquaintance with these people, hun- 
dreds of whom were brought under observation." To this ethnologi- 
cal paper I will add one more dealing with palaeo-botany, ‘Notes on 
the Erian (Devonian) Plants from New York and Pennsylvania,’ 
published in the Proceedings of the United States National Museum, 
vol. xvi, 1893. This is enough to show the great variety of subjects 
that occupied his attention and were treated with a masterly hand. 
David Pearce Penhallow was born at Kittery Point, Maine, on 
May 25, 1854, and was graduated at Amherst College, Massachusetts, 
receiving the degree of Bachelor of Science (B. S.) in 1873. Here 
he developed a passion for vegetable physiology, but he was not 
allowed to give himself up to this work, for not long after his gradua- 
tion he went to Sapporo, Japan, to assist in founding the Imperial 
College of Agriculture, President William S. Clarke of Amherst 
being at the head of the party, and William Wheeler, now of Concord, 
constituting the third member. "There Mr. Penhallow was Professor 
of botany and chemistry from 1876 to 1880, and acting President from 
1879 to 1880. He was accompanied during a portion of this time by 
his wife who was Sarah A. Dunlap of Amherst, and whom he married - 
on May 4, 1876. After finishing his engagement at Sapporo he 
returned to the United States, and soon after was appointed botanist 
