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A WEEKLY NEWSPAPER OF ALL THE ARTS AND SCIENCES. 



PUBLISHED BY N. D. C. HODGES, 8T4 BROADWAY, NEW YORK. 



Tenth Year. 

 Vol. XX. No. 509. 



NOVBMBEE 4, 1892. 



Single Copies, Ten Cents. 

 3.50 Per Year, in Advance. 



Contents. 



The Isolation of Rennet peom Bacteria 



Cultures. H. W. Conn 253 



Is THE Sao Francisco do Sul CSanta Cath- 

 ARiNA) Iron a Meteorite? Orville A. 



Derby 2,S4 



New Treatment for Snake-Bite and Other 



Poisons. W. H. Wooster 255 



On the Introduction of the European Bark- 

 Beetle-Destroyer (Clerus Formicarius 

 L.) TO America. CamilloF. Schaufuss. .. 256 

 GoLIAS Edusa and Colias Htale, a. Heath.. 257 



Notes AND News 267 



Why is Sea- Water Salt? W. Mattieu Wil- 

 liams . . 258 



The Energy-Function of the Magnetic Cir- 

 cuit. Chas. P. Steinmetz 258 



The Apparent Growth op Gold. Richard 



Eames 259 



Current Notes on Anthropology. — XVIII, 



Daniel &. Brinton, Editor 260 



Letters to the Editor. 



Ancient Mexican Heraldry. Agnes Crane. 261 

 Reticulated Protoplasm of Petomyxa. A. 



Cowley Malley 261 



The Fundamental Hypotheses of Abstract 



Dynainl's. J. G. MacGregor 262 



The Libyan Alphabet. A. H. Keane — - 262 

 Is There a Sense of Direction? J. M. Aldrich, 



Charles E. Bessey 262 



On Biological Nomenclature. S. W. Willis- 

 ton 263 



Solid Glycerine. C. C. Smith 263 



Book Reviews 263 



Among the Publishers 265 



Entered at the Post-OfHoe of New York, N.Y., aa 

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