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Eleventh Year. 

 Vol. XXI. No. 53 



JUNE 2, 1893. 



Single Copies, Ten Cents. 

 $3.50 Per Year, in Advancb. 



Contents. 



The Latest Discoveries in Chald^sia. Mar- 

 quis de Nadaillac. . 295 



An Experimental Basis for Literary Criti- 

 cism. Comvay MacMiUan 296 



In Eegard to Colok-Blindness Among Indians. 



Lucien I. Blake and W.S.Franklin 297 



The Vertical Script. W. H. Metzler 298 



Disinfectants and Disinfection. David Sevan. 298 



Iron and Aluminium in Bone Black : Their 

 Quantitative Determination. F. G. 

 Wiechmann 300 



OsTEOLOGicAL NoTES Daniel Denison Slade . . 301 



Letters to the Editor. 



The Mean Distance of the Earth. Alice 



Porter 302 



A Beautiful Spectacle. Alice Porter 803 



A Pall of Colored Snow. A N. Somers . .303 



The Aurora. M. A. Veeder 304 



Worms in the Brain of a Bird. O. H. French 304 

 Epidemic Forms of Mental or Nervous Dis- 

 eases or Disorders. Mrs.W. A.Kellerman. 305 



The Winter of 1709. C. B. Warring 305 



Animal EfBgios. C. B. M. 305 



Book Reviews. 



The Moon's Face. Joseph F. James 305 



The Mineral Industry. C. P. 307 



Entered at the Post-OfHce of New York, N.Y., as 

 Second-Class Mail Matter. 



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