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LETTER OF TRANSMITTAL. 
Unitep States DEPARTMENT OF AGRICULTURE, 
WeaTHER Bureau, OFFICE OF THE CHIEF, 
Washington, D. C., August 1, 1905. 
Hon. James Writson, 
Secretary of Agriculture, Washington, D.C. 
Sir: I have the honor to submit the manuscript of a first report, 
by Prof. Cleveland Abbe, on the Relations Between Climates and 
Crops, and to recommend its publication as a bulletin of the Weather 
Bureau. 
This paper is not designed as an original investigation, but as a 
summary of the views of the best experimentalists and observers, so 
far as those had been published up to 1891. <A continuation of this 
study, bringing the subject up to date, is contemplated; but as the 
publication of this first portion has been frequently requested, it 
seems wise not to delay. 
The author has intended to notice only those investigations that 
have given precise information as to specific plants or crops and spe- 
cific localities, and has made a thorough search of all the more impor- 
tant literature, in so far as it was accessible to him; it is believed 
that the numerous extracts given by him will be gratefully received 
by those who have not access to the same volumes. 
The work is prepared with the idea that it will be especially useful 
to. the teachers of the agricultural colleges and the investigators of 
the agricultural experiment stations. Therefore only a limited edition 
is recommended. 
As the memoir points out the importance of a climatic laboratory 
and the methods that must be pursued in order to evolve new varieties 
of crop plants adapted to special climatic conditions, I can but con- 
sider that you will recognize this memoir as a proper contribution to 
agriculture from the Weather Bureau. 
Very respectfully, Wituts L. Moors, 
Chief U. S. Weather Bureau. 
Approved : 
James WILson, 
Secretary. 
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