TO CORRESPONDENTS. 



Jluthors' Copies of Communications. — We wish it understood that twelve copies 

 of every original communication, published in this Journal, are at the disposal of 

 the author, on making known his desire to have them. If authors wish a larger 

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Authors should always specify at the head of their MSS. the number of extra 

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Our British correspondents are requested to forward all communications and par- 

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The titles of communications and of their authors, must be fully given. 



Return proofs, not to be sealed, or inscribed with any thing except corrections. 



Notice always to be given when communications seut to this Journal, have been, 

 or are to be, published also in other Journals. 



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 the space is all pre-engaged one number in advance. Attention to this request may 

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MAIL SUBSCRIBERS. 



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TO OUR SUBSCRIBERS. 



We are undw the necessity of urging our friends generally to exert themselves 

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Any one who sends us the subscription money of one year for four subscriber^. 

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