48 
ntain specimens corresponding to those collected by Professor Sargent, 
ee presented by Mr. Morris K. Jesup to the American Museum of 
Natural History in New York—the most eoe sg collection of the 
timbers of any great continent ever brought togethe 
From the Report of the Arnold Arboretum for 1590-1 we learn that 
the experiment, which proved highly successful, was begun during that 
year of furnishing the publie with popular instruction about trees and - 
shrubs, Mr. J. G. Jack, an assistant in the Arboretum, being appointed 
university lecturer on arboriculture for that urpose. 
The area of the Arboretum is 168 acres, some 40 acres having bee en 
obtained hy the City of Boston in addition to the original land. The 
ground was laid out by Mr. F. L. Olmsted, and, with the exception of a 
on a definite plan. It is believed that more than sufficient space has 
been allowed for the possible full growth of every tree, native or exotic 
which js hardy in the neighbourhood of Boston, and no supplement ary 
species, other than those expected to reach maturity, will be planted in 
the permanent collections. The ground which is, or will be, occupied 
by permanent trees has been prepared i in the most thorough and careful 
manner, ‘The contract executed between the President and Fellows of 
Harvard College and the City of Boston provides that the Arboretum 
shall be maintained where it now is for a thousand years, and there is 
good reason to hope, therefore, that many of the trees now planted will 
be allowed to live out the full term of their existence. Trees have 
never been planted with better promise of undisturbed old age. In the 
ics for 1885-6 we are informed that none of the trees in the type 
have been planted in pits less than ten feet square, and all trees 
i ted i 
Put singly and intended to develop into specimens are plan 
25 f v- Rock, y Soil vet been 
ved from all pits to a uniform feet ced 
remo 
by a compost of loam and peat. The soil, as far as practicable, has been 
deepened and enriched over the whole surface planted. As the 
permanent specimen of no large growing tree is placed at a less distance 
than a hundred feet from the group of individuals of the same species 
selected to show variation in character and habit, it will be possible to 
study the species as a single specimen, and to note its value in a mass 
under as -— natural conditions as it is possible to seeure in any 
artificial w 
On a carefull ly M mp the position of every permanent tree 
is marked, and reference to the card catalogue will nore: a M e 
history of every plant, so qas the student will know when 
planted (and whenee it came), or the eutting was root ted ; st if it is 
grafted, where the stock and scion came from, together with an account 
of its size or habit every year, and any peculiar circumstance connected 
with any stage of its li 
The natural advantages of the situation, with its beautifully undu- 
lating ground, are made the most of, and fine landscape effects are 
produced. The margins of the roadways are planted thickly with 
n 
their quarters and did not owe their positions to the forethought of the 
planters. Near the Birch collection a huge mass of Betula pumila 
forms the principal feature; more plants wi this species—which only 
grows a few feet high—are to be seen here than are to be found in 
cultivation in all other botanical Sai nisni combined. At the time 
