512 



SCIENCE. 



[N. S. Vol. III. No. 66. 



ment paper is covered with the fluorescing sub- 

 stance, and the shadows produced by the X-rays 

 may be directly seen. The instrument has the 

 general form of a stereoscope. Mr. Edison uses 

 tungstate of calcium, with which it is said it is 

 possible to see the shadow through three feet of 

 cork. 



M. Becquerel has reported to the Paris Acad- 

 emy that he has found that potassium uranyl 

 sulphide when excited to phosphorescence 

 gives rise to rays which last many hours (more 

 than 160) after the phosphorescence ceases, and 

 pass through paper aluminium and copper. 

 They also discharge electrified bodies in a man- 

 ner similar to the X-rays. 



A SERIES of field lessons on ' Birds in the 

 Bush' will be given by Mr. Ralph Hoffmann, 

 of Belmont, Mass., on Saturday mornings of 

 April, May and June, in the neighborhood of 

 Cambridge and Arlington, Mass. The object 

 of the course is to indicate the easiest means of 

 distinguishing the common birds native to this 

 region, and the more interesting of the migrants. 

 The songs of the different species, their favorite 

 haunts, their feeding habits, and the sites 

 chosen for their nests, will be studied. Before 

 each walk, skins of the birds likely to be found 

 will he examined. By beginning about the 

 middle of April students may learn many of 

 our common birds before the rush of migrants 

 in May, and by continuing into June may pur- 

 sue the study of our native birds after the mi- 

 grants have passed. 



A COMMITTEE from the New York Chamber 

 of Commerce has been organized to promote 

 the efficiency of the medical library in the New 

 York Academy of Medicine. An attempt is 

 being made to collect $100,000 for the library. 

 The library of the New York Academy of 

 Medicine is one of the most complete in the 

 world and is open, without charge, to all wish- 

 ing to use it. 



MM. A. AND L. LiTMiBRE have invented an 

 improvement on Edison's kinetoscope, which 

 they call a cinematograph. With this instrvi- 

 ment changing scenes are exhibited in their 

 natural size on a screen. The groups, such as a 

 crowd of people passing along the street or a 

 railway train entering and stopping at a station, 



are said to be very effective. Some nine hun- 

 dred instantaneous photographs are taken in 

 the course of a minute, and when these photo- 

 graphs are thrown on a screen by means of the 

 electric light at the same rate and order as they 

 were taken an exact reproduction of the mov- 

 ing people is obtained. 



The University of the State of New York 

 has recently issued Museum bulletin 14 on the 

 Geology of Moriah and Westport Townships, Essex 

 County. Besides describing the general geology 

 of these townships, this contribution to our 

 knowledge of the magnetic iron-ore deposits of 

 the United States discusses in detail the iron- 

 ore bodies of that region, gives the latest in- 

 formation on its important iron-ore deposits 

 and reviews the probable hypotheses as to their 

 origin. It contains a geologic map of the two 

 townships, a map of Miueville iron region, and 

 half-tone views of the mining district and sec- 

 tions of the ore bodies. The bulletin is mailed 

 postpaid to any address by the State Library 

 on receipt of 10 cents. Bulletin 15 on the 

 Mineral Resources of New York, by Dr. F. J. H. 

 Merrill, director of the Museum, is nearly 

 ready and will be mailed postpaid for 40 cents. 



UNIVERSITY AND EDUCATIONAL NEWS. 



GRADUATE SCHOLARSHIPS AND FELLOWSHIPS IN 

 THE UNIVERSITY OF PENNSYLVANIA. 



A LAEGE number of Graduate Scholarships and 

 Fellowships are about to be established in the 

 University of Pennsylvania. Provost Harrison 

 gave to the University last June, as stated at 

 the time in this journal, the sum of §500,000, 

 to be held as a special fund, and to be known 

 as the ' George L. Harrison Foundation for the 

 Encouragement of Liberal Studies and the Ad- 

 vancement of Knowledge.' The purposes of 

 the fund were described in the deed of gift as 

 follows : 



1. The establishment of Scholarships and 

 Fellowships intended solely for men of ex- 

 ceptional ability. 



2. The increasing of the Library of the Uni- 

 versity, particularly by the acquisition of works 

 of permanent use and of lasting reference to 

 and by the scholar. 



3. The temporary relief from routine work of 

 professors of ability in order that they may de- 



