Eleventh Year. 

 Vol. XXII. No. 552. 



SEPTEMBEE 1, 1893. 



Single Copies, Ten Cents. 

 I3.50 Per Year, in Advance. 



Contents 



Indian Relics in South Jersey. John Gifford 



Notes on Some Minnesota Mounds. Albert 

 Schneider 



Current Notes on Chemistry. Charles Piatt, 

 Editor 



The World's Congress Auxiliary of the Co- 

 lumbian Exposition. George H. John- 

 son 



A New Factor in Fruit Growing. B. T. 

 Galloway 



Railroad Signalling. Reginald Gordon 



Altitude in Spite of Humidity as a Cure of 

 Beri-beri. Albert S. Ashmead 



The Origin of Gold. Philip Lake 



On the Extremes of Heat and Cold Under 

 Which the Life of Species Is Possible. 

 Henry de Varigny 



Book Reviews 



Letters to the Editor. 



Animal Vocabularies. Mrs. W. A. Kel- 



lerman. 



The Circulation in Fresh- Water Mus- 

 sels. Goodwin D. Swezey 



Protective Mimicry of a Moth. E. S. 



Tucker 



Explosive Gas in Locomotive Engines. 



M. W. V 



Coyote or Bear. Agnes Crane 



THE WINNIPEG COUNTRY; 



VtiKSfVt4 ttANJU-UOOU.«$. 



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 Notes on Design of Small Dynamo, by G. Halliday, 

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