FOURTH REPORT OF THE MICHIGAN ACADEMY OF 



SCIENCE. 



LETTER OF TRANSMITTAI^ 



To Honorable A. T. Bliss. Oovernor of the State of Michigan: 



Sir — I have the honor to submit herewith the Fourth Annual Report 

 of the Michigan Academy of Science, for publication in accordance with 

 Section 14 of Act No. 44, of the Public Acts of the Legislature of 1899. 



Respectfully, 



JAS. B. POLLOCK, 

 Secretary of the Michigan Academy of Science. 

 Ann Arbor, Mich., Dec. 18. 1903. 



