LETTER OF TRANSMITTAL. 



Washington, July 6th, 1898. 



The Committee on Indexing Chemical Literature, appointed in 

 1882 by the American Association for the Advancement of Science, 

 has voted to recommend to the Smithsonian Institution for publication 

 the following : — 



Index to the Literature of Thallium, 1861-1896, 

 by Miss Martha Loan. 



H. CARRINGTON BOLTON, Chairman. 

 Mr. S. p. Langley, 



Secretary of the Smithsonian Institution. 



