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[Vol. XX. No. 500 



THIS OFFER 



Of TWO GREAT MAGAZINES, 

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Do You Know Them ? 



GOLDTHWAITE'S GEOGRAPHICAL MAGAZINE. 



The only popular illustrated publication of its kind in the world 

 Travels, Exploration"s, Discoveries. FACTS, not FICTION. 



MIJSrUBALS. 



A magazine treating in pof)alar style of the Mineral Kingdom, a science 

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THEY ARE NOT TECHNICAL, 



BUT READABLE, AND FREE FROM DRY STATISTICAL DETAIL. 



To know the world in which you live and all about its curious structure, you 

 should subscribe to and read these highly entertaining and instructive 

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Regular price of G. G. M. one (i) year, $2.00. 

 " " " Minerals, " " " i.oo. 



BOTH PUBLISHED MONTHLY. 



Offered now for 12 MONTHS for Two Dollars ($2.00). 

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Sftwple cojn/ MINEJRALS, lOc; G. G. 31., 15c. 



If you want a Map, Atlas, Globe or Phanisphere, Maps mounted, send to 

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The American Geologist for 1892. 



Edited by Pkof. S. Calvin. University of Iowa; Dr. E. W. Claypole, Buchtel College; John Eyerman. 

 Lafayette College; Dr. Persifor Frazer. Penu. Ilort. Soc; Prof F. W. Cragin, Colorado College; 

 Prof. Rob't T. Hill, U. S. Irrigation Survey; Dr. Andrew C. LiwsoN. University of CaUfornia; R. D. 

 Salisbury, University of Wisconsin; Joseph B. Tyrrell, G-eol. Sar. of Canada; E. O Ulrich, Minnesota 

 Geological Survey: Prop. I. C. White. University of vVest Virginia; Prof. N. H. Winchell. University 

 of Minnesota. Now in its IXth volume. S3 50 per year. Sample copies, 'ZQ cents. Address 



THE GEOLOGICAL PUBLISHING CO., MinneapoUs, Minn. 



PEEIODICALS. 



' The Magazine for Hot Weather." 



ii^REVlEW-REVIEWS! 



Is "A Summer Magazine" 



BECAUSE—'* If one has only ten minutes 

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well and 

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is illustrated lavishly and 

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through 

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BECAUSE—" The usual bright and tren- 

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EDUCATIONAL. 



Walker Prizes in Natnral History. 



Tlie Boston Society of Natural History 



offers a first prize of from $60 to $100 and a second 

 prize of a sum not exceeding $5), for the best 

 memoirs, in English, on the folJowing subject: 



CONTRIBUTIONS TO OUR KNOWLEDGE OF 

 THE LIFE-HISTORY OF ANY PLANT OR ANI- 

 MAL. 



Each memoir must be accompanied by a sealed 

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 scribed by a motto corresponding to one borne by 

 the manuscript, and must be handed to the Secre- 

 tary on or before April 1, 1893. 



For further particulars apply to 



SAMUEL HENSHAW. Secretary. 



Boston, July 26, 1892. 



The Observer. 



Published Monthly at Portland, Conn. 

 A MEDIUM OF INTERCHANGE OF OBSERVATIONS FOR ALL 



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E. F. BIGELOW, Editor and Publisher. 

 ASSOCIATE EDITORS: 

 M. A. BOOTH, F.R.M.S., Microscopy, Longmeadow, Mass. 

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A. W. PEARSON, Entomology, Norwich, Conn. 



C. A. SHEPARD, Botany, New Britain, Conn. 



C. A. HARGRAVK, Conchology, Danville, Ind. 



F. P. GORHAM, Geology, 103 Knight St., Providence, R. I. 

 Yearly Subscrijition, $1. Single Wumber, lO Cents. 



Minerals, 



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Mineralogy, Geology, Paleontology, Zoology, Osteology, Anatomy. 



Send for Circular. ROCHESTER, N. Y. 



Stuffed Animals 



and Skins, 



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