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The upper floor of the new wing contains the books of the fifteenth, 
sixteenth and seventeenth centuries, books on dendrology, monographs 
of genera, forestry, landscape gardening, medical and economic botany, 
pathology, natural history, biography and autobiography. 
Since 1904 Miss Ethelyn Maria Tucker has catalogued and arranged 
the books and prepared the manuscript of the printed Catalogue of the 
library published in two volumes, 1914-1917. Since the publication of 
the second volume 6000 titles have been added to the collection. 
In the main hall, besides the standard works of reference, the Floras, 
large folios on sliding shelves, and the collection of photographs, can 
be found a nearly complete set of the botanical works of Linnaeus in 
all editions, including the rare “Viridarium Cliff ortianum, ” believed 
to be the only copy in the United States since the one in San Fran- 
cisco was destroyed in the earthquake in 1906. For twenty-five years 
the Arboretum sought to obtain this small book. The Arboretum is 
one of nine libraries in the United States known to contain original 
Linnean dissertations. The publications of Asa Gray and of three gen- 
erations of De Candolles are in this room, in which will be found all 
the folios of Redoutd, one of the greatest of all botanical artists who 
lived about one hundred years ago in Paris, including Les roses and 
Les liliacees, and all the works relating to woody plants illustrated 
by him. 
In the main hall attention is also called to the folios of Jacquin, an 
Austrian botanist, the most valuable of which is the Selectarum stir- 
pium americanum historia, cir. 1780, of which there were only eighteen 
copies issued, and at the time the Arboretum copy was obtained it was 
the only one in this country; there are now two other copies, one in the 
library of the New York Botanical Garden and one in the Congressional 
Library in Washington. The two folios of Dioscorides’ Codex in heavy 
board covers which lie on nearby shelves reproduce in facsimile the 
pages and plates of the famous Codex prepared in 512 A.D. for Anicia 
Juliana, daughter of the Emperor of the Eastern Empire, which is 
now preserved in the Hofbibliothek at Vienna. The original is the 
oldest known manuscript of a botanical work, written in Greek on 
Materia medica in the first century after Christ and describes or names 
more than five hundred plants. For sixteen centuries this book was 
considered the highest authority, and became the basis of modern 
treatises on botany, and from it this science derives nearly all its nom- 
enclature. Attention is called to the Bradley Bibliography in five vol- 
umes, comprising 3895 pages, prepared by Mr. Alfred Rehder and to 
the other books written by members of the staff. In the main hall 
are also a large octavo edition of Audubon’s Birds of America in seven 
volumes, 1840-44; Captain Thomas Brown’s Illustrations of the Ameri- 
can ornithology of Alexander Wilson and C. L. Bonaparte, folio edi- 
tion, published in London in 1835, of which only thirteen copies are 
known to exist, eight being in the United States; complete collections 
of the works of Rafinesque, and of Engelmann; Engler and Prantl’s Die 
natiirlichen pfianzenfamilien to date; Engler’s Pjianzenreich to date; 
Bonpland and Humboldt’s Voyage, 6^ partie, Botanique in seven folio 
volumes, 1815-25; Annals of the Calcutta botanic garden, vol. i-xii, 1887- 
1914, folio; Martius’ Historia naturalis palmarum in three folio volumes, 
1823-50; Reichenbach’s leones florae germanicae et helveticae; three edi- 
