LETTER OF TRANSMIITAL. 



U. S. Department of Agriculture, 



Bureau of Chemistry, 

 Washington, D. C, April 8, 1912. 

 Sir : I have the honor to transmit for your inspection and approval 

 a manuscript prepared in the Miscellaneous Division of the Bureau 

 of Chemistry, reporting results of an investigation of methods for the 

 determination of lithium and a spectroscopic method developed in 

 this bureau for the determination of small amounts of this element. 

 I recommend that this manuscript be published as Bulletin No. 153 

 of the Bureau of Chemistry. 

 Respectfully, 



R. E. Doolittle, 



Acting Chief of Bureau. 

 Hon. James Wilson, 



Secretary of Agriculture. 



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