SCIENCE. 



SCIENCE: 



A WEEKLY JOURNAL OF SCIENTIFIC PROGRESS. 



ILLUSTRATED. 



TERMS. 



One Year, ________ Four Dollars. 



Single Number, _______ Ten Cents. 



Six Months, ------ Two Dollars and-a-Half. 



To Correspondents. 



All communications should be addressed to the Editor — box 3838, P. 0., New York — with name and address of 

 writer, not necessarily for publication without consent. 



Scientific papers and correspondence intended for publication should be written legibly on one side only of the 

 paper. Articles thus received will be returned when found unsuitable for the Journal. 



Those engaged in Scientific Research are invited to make this Journal the medium of recording their work, and 

 facilities will be extended to those desirous of publishing original communications possessing merit. 



Proceedings of Scientific Societies will be recorded, bat the abstracts furnished must be signed by the 

 Secietaries. 



Both questions and answers in " Notes and Queries " should be made as brief as possible ; an answer appearing 

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To Subscribers. 



Terms of subscriptions for SCIENCE will be $4 a year, payable in advance. Six months, $2.50. Single copies 

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Subscriptions forwarded by mail should be addressed to the Editor, Pox 3838, P. O., New York, and Post-office 

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