Cambridge, March 11, 1859. 



Dear Sir: — 



The next meeting of the American Association for the Ad- 

 vancement of Science will be held at Springfield, Mass., commencing 

 Wednesday, August 3, 1859. 



The Proceedings of the Baltimore Meeting (Vol. XII.) have been pub- 

 lished, and can be forwarded to those who have paid the assessment for 

 that meeting, by mail or express. Please forward the postage (twenty-four 

 cents), if you wish to receive, by mail, the copy to which you may be enti- 

 tled. Notice is given that complete sets of former volumes of Proceedings 

 can be obtained, at $ 1.50 per volume, by those who have joined the Asso- 

 ciation since they were published. 



You are indebted to the Association, — 



For the Montreal meeting, $ 3.00 



" Baltimore " 3.00 



$6.00 



These dues may be forwarded to the Permanent Secretary, at 

 Cambridge, Mass. Eastern bank-bills are preferred, as the expense of the 

 exchange is saved. 



Your attention is called to the following Kule in the Constitution : — 

 " Kule 19. The names of all persons two years and more in arrears 

 for annual dues shall be erased from the list of members ; provided that 

 two notices of indebtedness, at an interval of at least three months, shall 

 have previously been given." 



Respectfully yours, 



JOSEPH LOVEPJNG, 



Permanent Secretary. 



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