SCIENCE 



Sixth Year. 

 Vol. XI. No. 258. 



NEW YORK, JANUARY 13, r{ 



Single Copies, Ten Cents. 

 {3.50 Per Year, in Advance. 



Entered at New York Post-Office as Seoond-Olass Mail-Matter. 



Editorial . . 



13 



Book-Reviews. 











Science- Teaching in the Public Schools. — Food and Smoke at 





Geology and Mining Industry of Leadville, Col. 



18 



Scientific Meetings. 





An Inquiry into Socialism . 







19 



Modern-Language Association . 



13 



Notes and News 







19 



Scarlet-Fever Report. — III. 



14 



Letters to the Editor. 













The Trinity Formation of Arkansas, 



Indian Territory, and 





Exploration and Travel. 





Texas .... 





Rob'i T. Hill 



2r 



Transvaal ...... 



17 



Children's Development 







G. 



21 



Zanzibar . . . . . . '. 



17 



Is there a Venomous Lizard ? 







Henry L. Ward 



21 



Farini and Chavanne ..... 



17 



Sections of Fossils 







Aug. F. Foerste 



22 



The Obangi ...... 



17 



Weather-Predicting 

 American Microscopes 







H. Helm Clayton 

 C. S. Miiiot 



22 

 23 



Mental Science. 





Arkansaw and Kansaw 







J. Owen Dorsey 



24 



Re-action Time for Sensations of Temperature 



17 



Cheyenne 







J. Owen Dorsey 



24 



Visual Units in the Retina ..... 



18 



The Eskimo Ring-Finger . 







John Murdoch 



24 



The Psychology of Joking ..... 



18 



Queries 









\ 



SUPPLEMENT.— Address of M 



ajor 



Powell in Memory of Professor Baird. 





The Science Company, P^Lblishers, ^7 Lafayette Place, New York^ 



London agent: G. E. Stechert, 26 King William St., Strand. 



IMPORTANT TO SUBSCRIBERS. 



Realizing that the .circulation of 



SCIENCE 



can be increased in no way better than by the honest 

 recommendation and aid of its subscribers, the pub- 

 lisher of SCIENCE is prepared to extend for six 

 months the term of any subscriber who will forward 

 with the money for one year ($3.50) the name of a new 

 subscriber not already on the list. Liberal commissions 

 will be paid canvassers. Address, 



PUBLISHER OF SCIENCE, 



47 Lafayette Place, New York. 



