1922] SARGENT, FIRST FIFTY YEARS OF THE ARNOLD ARBORETUM 167 



for the Arboretum; The Cherries of Japan (1916) by Mr. Wilson; The 

 Conifers and Taxads of Japan (1916) by Mr. Wilson; A Monograph of 

 Azaleas by Messrs. Wilson and Rehder (1921); twelve volumes of the 

 Bulletin of Popular Information (1911-22); the first three volumes of the 

 Journal of the Arnold Arboretum (1919-22); and an illustrated Guide to 

 the Arnold Arboretum (1911) with a second edition in 1921. 



The following are some of the works which have been prepared by the 

 Director in this library but were not published by the Arboretum : Report 

 on the Forests of North America, being the ninth volume of the Final 

 Reports of the Tenth Census of the United States (1884); The Woods of 

 the United States with an account of their structure, qualities and uses 

 (1885); The Silva of North America in fourteen volumes with seven hun- 

 dred and forty plates (1891-1902); Trees and Shrubs; illustrations of new 

 or little known ligneous plants, prepared chiefly from material at the 

 Arnold Arboretum (1905-1913), largely by officers of the Arboretum. The 

 ten volumes of Garden and Forest, a journal of horticulture, landscape art 

 and forestry (1887-1897), were edited in the Arboretum library, in which 

 Mr. Alfred Rehder has prepared the descriptions of a large part of the trees 

 and shrubs included in Bailey's Cyclopedia of American Horticulture and 

 in the second edition of that work, The Standard Cyclopedia of Horti- 

 culture. 



PHOTOGRAPHS 



The Arboretum collection of photographs now contains nine thousand 

 six hundred pictures of trees and shrubs, types of vegetation, gardens and 

 scenery. The photographs are mounted on cards 11% inches long and 93^ 

 inches wide and are arranged systematically in steel drawers. The two 

 thousand eight hundred pictures made by Wilson in eastern Asia and 

 Australasia form the most valuable and interesting part of I this collection. 

 The Arboretum photographs have been carefully catalogued by Miss 

 Tucker and can be easily and quickly examined. This collection proves 

 to be an important and useful addition to both the Library and Herbarium. 



EDUCATION 



The Arboretum in the conception of its managers is a museum 

 founded and carried on to increase the knowledge of trees. This they have 

 endeavored to do by a collection of living plants arranged for convenient 

 examination and study, by the distribution of surplus material obtained 

 in the Arboretum explorations, and by the publication of the results of the 

 dendrological investigations carried on in its laboratories. That they have 

 been at least partly successful is shown by the standing of the Arboretum 

 in the estimation of the men in different countries best able to judge of its 

 usefulness. 



No attempt has been made to give instruction at the Arboretum to 



