166 JOURNAL OF THE ARNOLD ARBORETUM [VOL. in 



In 1904 Miss Ethelyn M. Tucker joined the staff of the Arboretum to 

 assist in the care of the library and to prepare a Catalogue of its contents. 

 In 1918 she was appointed Librarian. The books in the library have been 

 systematically arranged by her under the system usually followed in Ameri- 

 can libraries and are fully and completely catalogued. When Miss Tucker 

 began in 1904 to prepare the manuscript for a printed Catalogue the library 

 contained 10,000 volumes; when the first volume of the catalogue was 

 printed in 1914 the number had increased to 30,000. The printed catalogue 

 is contained in two quarto volumes. The first, which is devoted to peri- 

 odicals and to authors and titles, contains 782 two-column pages, and in 

 the second volume, which appeared in 1917 contains 542 two-column pages, 

 the books are arranged according to subjects. 



Early in the formation of the library it became evident that to build up 

 a dendrological library and to carry on at the Arboretum a critical study 

 of trees and other woody plants more information about the literature of 

 trees than could be found in any printed bibliography was necessary. To 

 meet this difficulty a plan was carefully worked out for a bibliography to 

 contain a reference to every book, every magazine article and every paper 

 in the Transactions of Learned Societies relating to trees or shrubs in all 

 languages published before the end of the nineteenth century. This 

 work was entrusted to Mr. Alfred Rehder, at that time assistant in the 

 Herbarium, who began work on it in March 1900, and devoted his time to it 

 until the printing of the last volume was finished. During the preparation 

 of this book Mr. Rehder visited every library in the eastern United States 

 in which botanical or horticultural books are found, and during two visits 

 in Europe extending over a period of twenty-seven months studied in 

 the botanical libraries of Great Britain, France, Spain, Denmark, Norway, 

 Sweden, Germany, Austria, Italy and Russia. The name of this work is 

 the Bradley Bibliography as it was partly paid for from the income of a 

 gift made in 1897 to the Arboretum by Miss Abby A. Bradley of Hingham 

 as a memorial to her father William Lambert Bradley. The first two vol- 

 umes devoted to an enumeration of works on Dendrology, were issued 

 in 1911, and in 1912. Volume iii. devoted to Arboriculture and the 

 Economic Properties of Woody Plants appeared in 1915; volume iv. con- 

 taining an enumeration of works on Forestry, in 1914, and the fifth and 

 final volume, which contains the Index of Authors and Titles and a 

 subject Index of the whole work, in 1918. The five volumes of the Bradley 

 Bibliography contain rather more than one hundred thousand titles of 

 books and papers relating to trees and shrubs printed on three thousand 

 seven hundred and eighty-nine two-column quarto pages. 



Other works prepared in the Library and Herbarium and published by 

 the Arboretum are, 



The Pines of Mexico (1909) and a monograph of the Genus Pinus (1914) 

 by Mr. George R. Shaw; The Plantae Wilsonianae (in 3 vol. 1913-17), 

 being an account of the plants collected in western China by E. H. Wilson 



