by the park drives and by trolley cars. It is owned by Harvard 
University and constitutes one of its most renowned and active 
departments. 
A part of the land is a forest in which many of the trees 
common to the region are growing under forest conditions, and 
a rocky and precipitous hill covered by the most perfect example 
of natural Hemlock forest to be found in this part of the country. 
All the rest of the land has been planted so skilfully that the 
natural beauty has been preserved and enhanced. The impression 
of a systematically arranged botanical garden is not given but all 
seems to have developed naturally, and the plants to be in 
situations which they themselves would prefer, and in happy 
relationship with their neighbors. The trees are arranged in 
family groups, all the species of each genus being together and 
the shrubs with the exception of those of genera which also 
include trees are planted in parallel rows with grass paths 
between. 
Ability to use a museum depends greatly upon the manner 
in which the objects are labelled and the system used here gives 
each plant a display label stating the common and botanical 
name with the region of origin, and in addition each plant bears 
an attached zinc label giving age and pedigree and a number 
which refers to a card catalog. 
It is designed that the collections here shall include 
representatives of all the trees and shrubs which can be grown 
under New England climatic conditions, truly a magnificent 
conception, and great progress has been made in its fulfillment. 
Its collections have been enriched by many expeditions under- 
taken by its staff, often into regions but little explored. 
The scientific work of the Arboretum has made it known over 
the civilized world and the highest appreciation has come from 
those directing similar institutions in Europe. It may be said 
without exaggeration that the Arboretum at the end of its first 
fifty years has become the most important dendrological station 
in the world and is among the great American scientific stations 
which have not superiors in Europe. Mr. W. J. Bean of the 
Royal garden at Kew says in an appreciative article written in 
1910, "One of Professor Sargent's great tasks for some years 
has been the elucidation of the North American Cratege. It has 
involved an enormous labor but in the course of it he and his co- 
workers have been able to introduce to cultivation many new, 
very distinct and beautiful species. From ten to twenty years 
must elapse before this collection reaches its best, but it will 
eventually constitute probably the most complete assemblage of 
the members of a single genus in the world." In addition to 
the introduction of new species many old species of great value 
which had become rare or practically lost have been recovered. 
While experimental hybridization has not been one of the 
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