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. 



" Science" occupies a field in Periodical Literature hitherto unoccupied, and is the only First Class Weekly 

 Journal in the United States, devoted to Science, recognized by Scientists as their medium of communication. 



To all who desire to be kept au courant with the progress of Science this Journal will be found invaluable. 

 It is offered in a size convenient for binding, and will form two annual volumes with good Indexes, replete with 

 original articles by the most eminent Scientists, and as a standard work of reference on scientific subjects should find 

 a place in every Library and Household. 



The list of Associate Editors is not yet complete, but so far it comprises the names of Professional Scientists 

 who stand at the head of the various branches of Sciences with which they have identified themselves. 



The Editor will be glad to. hear from those who will take an interest in the success of this Journal, or who 

 desire to co-operate in any way ; and suggestions will always be welcomed and receive due attention. The intention 

 of publishing " SCIENCE" has been known only to a few, but the following well known and esteemed Scientists 

 have expressed either their intention to contribute, or their approval of the object of the Journal, and good wishes 

 for its success 



Professor SPBNCER F. BAIRD, and Dr. ELLIOTT Coues, Smithsonian Institution, Washington, D. C. ; Professor Edward 

 S. HOLDEN, Naval Observatory, Washington ; Professor O. C. Marsh, Yale College; Professor Burt G. Wilder, Cor- 

 nell University ; Professor C. A. YOUNG, Princeton College ; Professor S. W. BURNHAM; Chicago ; Professor O. Stone, 

 Observatory, Cincinnati ; Dr. J. S. BILLINGS, National Board of Health, Washington ; Professor William A. Hammond, 

 M. I)., New York; Dr. Edward ('. Si-itzka, New York ; Prof. CLEVELAND Abbe, Army Signal Office, Washington ; 

 Professor Edward S. Morse, Peabody Academy of Science, Salem, Mass.; Professor Alex. A. Julien, Columbia 

 College, New York; Dr. J. J. Woodward, Surgeon General's Office, Washington; Professor II. P. BoWDITCH,' Cam- 

 bridge, Mass.; Professor II. L. SMITH, Hohait College, Geneva, N. Y. ; &'c, &c, &C. 



All Communications should be addressed to THE EDITOR, Box 

 3838, P. O. New York. 



