LETTER OF TRANSMITTAL. 



Washington and Lek University. 

 Department of Chemistry, 



Lexington, Va., October 18, 1.904. 

 The Committee of the American Association for the Advancement of 

 Science having charge of Indexing Chemical Literature has voted to 

 recommend to tlie Smithsonian Institution for publication the fol- 

 lowing : 



Index to the Literature of Gallium, 1875-1903; 



Index to the Literature of Germanium, 1886-1903 ; 



l>()th i)repared l)_y Philip E. Browning, Ph. D., of the Kent Chemical 

 Lal)oratory of Yale University. 



James TiEWis Howe, 



ChairmoM. 

 Mr. S. P. Langley, 



Secretary of tJie Smithsonian Tnstitntion. 



This publication forms one of the following'series : 

 Index to the Literature of Uranium, 1785-1885, by Henry Carrington Boltou, 1885. 

 Index to the Literature of Columbium, 1801-1887, by Frank W. Traphagen, 1888. 

 Index to the Literature of the Spectroscope, by Alfred Tuckerman, 1888, 1902. 

 Index to the Literature of Thermodynamics, by Alfred Tuckerman, 1890. 

 A Bibliography of the Chemical Influence of Light, by Alfred Tuckerman. 1891. 

 A Bibliography of Aceto-Acetic Ester, by Paul H. Seymour, 1894. 

 Index to the Literature of Didymium, 1842-1893, by A. C Langmuir, 1895. 

 Indexes to the Literature of Cerium and Lanthanum, by W. H. Magee, 1895. 

 A Bibliography of the Metals of the Platinum Group, by .las. Lewis Howe, 1897. 

 Review and Bibliography of the ^Metallic Carbides, by J. A. Mathews, 1898. 

 Index to the Literature of Thallium, 1861-1897, by Miss Martha Doan, 1898. 

 Index to the Literature of Zirconium, by A. C. Langmuir and Charles Baskerville, 



1899. 

 A Bibliography of the Analytical Chemistry of Manganese, 1785-1900, by Henry 



P. Talbot and John VV. Brown, 1902. 

 Index to the Literature of Thorium, 1817-1902, by Cavalier H. Joiiet, 190.".. 



