CONTENTS. Vll 



A. C. HADDON. 



Anthropology at the Toronto Meeting of the British Association 367 



WM. HALLOCK. 



An Hydraulic Working Model of the Wheatstone Bridge 318 



An Improved Method of Projecting Views of the Moon (see "Science") 332 



Calculated Curves for the Position of the Vibrating String 376 



Science and Voice Production (public lecture) 70 



Vertical Kesearch Laboratory at Columbia University and Deep Well in 



Silesia 368 



N. K. HARRINGTON. 



Notes on the Copulatory Process in Lumbrieus terrestris 368 



Observations on Earth Worms 370 



The Life History of Entoconcha, a mollusc parasitic in a Holothurian. . 76 



EOMEYN HITCHCOCK. 



A Nevr Process for the Commercial Production of Pure Oxygen Gas 376 



ARTHUR HOLLICK. 



Eecent Explorations for Prehistoric Implements in the Trenton Gravels 



(see " Science," Nov. 5, 1897) 395 



E. O. HOVEY. 



On a Deep Well-boring at Key West, Florida (in " Bulletin of the Mu- 

 seum of Comparative Zoology, Vol. XXIII., p. 65) 43 



HARWOOD HUNTINGTON, PH.D. 



Technology of Cotton Cloth ( public lecture) 331 



A. HRDLICKA. 



Anthropology and Psychology at the Detroit Meeting of American Asso- 

 ciation 366 



A. V. W. JACKSON. 



Notes Descriptive of some Parsi Ceremonies 330 



Eeport of the recent Congress of Orientalists in Paris 374 



HAROLD JACOBY. 



On Two Trail-plates of Circumpolar Stars made by Anders Donner, at 



the Helsingfors Observatory 139 



A. A. JULIEN. 



The Sculpture and Sorting of Sands 166 



