April 28, 1899.] 



SCIENCE. 



617 



The General Committee in' charge of the 

 various sections were as follows : 



Anatomy: Jos. S.Elake. 

 Adronomy : J. K. Rees. 

 Botany : C. C. Curtis. 

 Chemistry : Charles A. Doremus. 

 Electricity ; Geo. F. Sever. 

 Ethnology and Archxology : L. Farrand. 

 E.rperimental Psychology : Chas. H. Judd. 

 Geology and Geography : J. F. Kemp and E. H. 

 Cornish. 



Mineralogy : A. J. Moses. 

 Paleontology : Gilbert van Ingen. 

 Photography : Cornelius Van Brunt. 

 Physics : C. C. Trowbridge. 

 Zoology: Garj' N. Calkins. 



While the display was not marked bj' 

 any one prominent object, such as X-rays, 

 still it was characterized by an excellent 

 average of exhibits of sterling value, and 

 should give its visitors an illustration of 

 scientific interest as distinct from the 

 spectacular. 



It would, of course, be too prolix to at- 

 tempt to give anything more than a few of 

 the typical objects enumerated in the cata- 

 logue of some twentj' pages. 



The exhibit in Anatomy, though small in 

 space, contained examples of most interest- 

 ing points. The variations in the vermiform 

 appendix, in the hepatic artery, etc. 



The Harvard, Lick and Yerkes Observa- 

 tories joined with that of Columbia in mak- 

 ing the department of astronomy thor- 

 •ougly representative of the recent interest- 

 ing advances in that subject. Saturn's new 

 moon, the new planet Eros, the rotation of 

 the sun as shown in the Johns Hopkins 

 spectra, the variation of latitude, vied with 

 ■one another for popular favor. 



The Bronx Park Botanical Garden con- 

 tributed much interesting material to the 

 Section of Botanj', which contained some 

 twenty titles. 



In Chemistry popular interest seemed 

 about equally divided between Munroe's 

 illustrations of the effects of dynamite. 



smokeless powder and phenyldimethylpyr- 

 azolonesulphonates. 



Ethnology showed Eskimo property 

 marks, British Columbia baskets, a new 

 hieroglyphic writing fi-om Mexico, and other 

 objects of almost equal interest. 



Photometry, illusions, binocular rivalry, 

 accuracy of movement and endurance were 

 the objects of measurements in psychology. 



Under Geology and Geography were 

 shown recent work of the U. S. Geological 

 Survey, the Maryland and the New York 

 State Surveys, including the Geologic model 

 of the Yellowstone National Park made by 

 the U. S. Geological Survey to go to the 

 Paris Exposition, and a relief map of the 

 Adirondack Kegion made by Merrill. A 

 suite of crude petroleums and several others 

 of interesting rocks, together with large 

 thin sections (three inches square) of rocks, 

 furnished interesting material for the geol- 

 ogist and petrographer. 



Mineralogy made a bewildering display 

 of beautiful and interesting minerals and 

 apparatus, with examples of photo-micro- 

 graphs and photographs with uranium rays. 



Physics presented grating spectra from 

 Johns Hopkins, illustrating rotation of sun, 

 effect of pressure upon the arc spectra, 

 Zeeman effect and coincidence of metallic 

 and Fraunhofer lines, special colorimeters, 

 distillation apparatus, Crookes tubes, abbre- 

 viated continuous mercury vacuum pumps, 

 a special arc light and audimeter, the effect 

 of an alternating magnetic field upon a 

 lamp filament, line screens for color photog- 

 raphy, a complete set of apparatus for re- 

 search in Hertz waves and wireless teleg- 

 raphj', a low resistance and a standard- 

 comparison Wheatstone bridge, apparatus 

 used in measuring specific heat and tem- 

 pei'ature at mines 200 degrees Centigrade, 

 also the new Dudley strematograph with re- 

 sults of its use in measuring stresses in rail- 

 road rails under moving trains. 



Among many interesting exhibits in Pale- 



