SCIENCE 



Editoeial Committbe : S. Newcomb, Mathematics ; E. S. Woodward, Mechanics ; E. C. Pickeeing, 



Astronomy; T. C. Mendknhall, Physios; E. H. Thurston, Engineering; Ira Eemsbn, Chemistry; 



J. Le CoNTE, Geology; W. M. Davis, Physiography; Henry P. Osborn, Paleontology; W. K. 



Brooks, C. Hart Mbrriam, Zoology; S. H. Scuddkr, Entomology; C. E. Bessby, N. L. 



Brition, Botany; C. S. Minot, Emhryology, Histology; H. P. Bowditch, Physiology; 



J. S. Billings, Hygiene ; J. MoKebn Cattbll, Psychology; 



J. W. Powell, Anthropology. 



Friday, Apeil 6, 1900. 



CONTENTS: 



The Prevalent Diseases in the Philippines: Pro- 

 fessor Simon Flexker, Professor Lew- 

 ellys F. Barker 521 



A Popular Account of some New Fields of Thought 

 in Mnthemaiics : Professor G. A. Miller... 528 



The Mechanics of Slow Motions: Professor 

 Chas. S Slighter 535 



Maryland's Highway Report : PROFESSOR J. A. 

 Holmes 536 



Work and Expenditures of the Agricultural Ex- 

 periment Stations for the Year ending June 

 SO, 1899 _. 540 



Scientific Books : — 



Tlie Diuturnal Theory of the Earth: T. C. M. 

 SIcMahon on the Differential Calculus : C. 

 J. Keyser, Lapouge's I'Aryen, Carlos C. 

 Clossen 546 



Scientific Journals and Articles 549 



Societies and Academies: — 

 Nmo York Academy of Sciences, Section of Astron- 

 omy, Physics and Chemistry: Dr. Wm. S. . 

 Day. The Torrey Botanical Club : PROFESSOR 

 E. S. Burgess. Tlie Academy of Science of St. 

 Louis: Professor Wm .Teelease. The 

 Philosophical Society of Washington : E. D. 

 Presion 550 



Discussion and Correspondence .•— 



Electrical Units and the International Congress : 

 T. C. M. Necturus Maculosus Eafinesque in the 

 Lower Delaware River: HENRY W. FoWLEE. 

 Lampreys in Captivity : Albert M. Eeese 554 



Notes on Physics : — 



Tlie Rationalism of Electrical Units : W. S- F... 555 



Scientific Notes and Neios 556 



University and Educational Netvs 560 



MSS. intended for publication and books, etc., intended 

 for review sliould be sent to tlie responsible editor, Profes- 

 lor, J. McKeen Cattell, Garrison-on-Hudson, N. Y. 



THE PREVALENT DISEASES IN THE PHILIP- 

 PINES* 



We have the honor to submit to you a 

 brief account of our work and movements 

 in carrying out your commission to study 

 the prevalent diseases in the Philippine 

 Archipelago. Your commissioners, con- 

 sisting of Dr. Simon Flexner and Dr. L. F. 

 Barker, to whom were voluntarily attached 

 Messrs. J. M. Flint and F. P. Gay, of the 

 Medical School, the latter having given 

 their time and paid all their own expenses, 

 sailed from Vancouver on March 29, 1899, 

 and arrived in Manila, May 4th, where they 

 immediately established themselves for the 

 purpose of the work mentioned. Owing to 

 the military situation it was found im- 

 practicable to visit other ports in the Archi- 

 pelago, or to penetrate into the interior of 

 the Island of Luzon. The entire time, 

 therefore, of the commission was spent in 

 the study of disease existing among the 

 natives and American troops in Manila and 

 at Cavite. 



WORK ISr JAPAN AND HONG-KONG. 



As transport sailings were uncertain and 

 the passage out by them slow, it was de- 

 cided to save time and go by fast steamer, 

 the Canadian Pacific Railway giving es- 



* Eeport upon an expedition sent by the Johns Hop- 

 kins University to President Gilman, Doctors Welch 

 and Osier, Philippine Committee of the Johns Hop- 

 kins University Medical School. 



