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THE BRADLEY BIBLIOGRAPHY

A GUIDE TO THE LITERATURE OF THE WOODY PLANTS OF THE WORLD
PUBLISHED BEFORE THE BEGINNING OF

THE TWENTIETH CENTURY

COMPILED AT THE ARNOLD ARBORETUM OF HARVARD UNIVERSITY
UNDER THE DIRECTION OF CHARLES SPRAGUE SARGENT

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JUN 12 1914

NT .R26

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V

INTRODUCTION TO VOLUME IV

OLUME IV. of the Bradley Bibliography is intended to contain the titles of all publications relating to forestry and silviculture, including the more important articles published in periodicals and other serials. To collect these articles the principal forestry periodicals have been completely excerpted, and papers relating to forestry have been extracted from agricultural, horticultural and botanical periodicals, and from serial publications of a general character.

The libraries which have been examined by the compiler are mentioned in the introduction to volume i. In addition to the list of foreign assistants enumerated in that volume our thanks are due to P. Bertholet, of Lausanne, by whom the Swiss and Italian forestry periodicals and in part the Spanish forestry periodicals have been excerpted, to K. Eppner of Munich and to Dr. Harrer of Vienna, who have excerpted several of the German and Austrian forestry periodicals. Unfortunately lack of time has prevented Mr. E. Wolf of St. Petersburg, who has compiled the Russian forestry literature for the Bibliography, from excerpting the Russian periodicals devoted to this subject; and we have been unable to find in Sweden an assistant able to excerpt articles on forestry from the periodicals of that country.

Following the dendrological part of the Bibliography and to avoid the repetition of many titles the publications dealing with a certain family, genus or species are entered under their respective divisions in the taxonomic arrangement. Thus a paper dealing with an insect disease of the Norway Spruce will be found under Picea Abies, subdivision Diseases, and not under Diseases caused by Insects; a paper dealing with the yield of the White Pine will be found under Pinus Strobus, subdivision Forest Management, and not under Determination of Yield or under Volume Tables.

In the taxonomic arrangement the nomenclature, sequence of families and limitation of genera are the same as in volume ii.

Additional references to families, genera and species which are not strictly silvicultural or forestal may be found in volume ii. and in the taxonomic part of volume iii.; additional references to general descriptive botany, to morphology and anatomy, to physiology, ecology, evolution, etc., in volume i., and to cultivation, diseases and economic products in volume iii.

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