FRAGMENTS OF SCIENCE. 



711 



The Bear River Formation and Its Characteristic 

 Fauna ; No. 129. Earthquakes in California in 

 1894 ; No. 131. Report of Progress of the Division 

 of Hydrography for the Calendar Years 1893-'94 ; 

 No. 132. The Disseminated Lead Ores of South- 

 eastern Missouri ; No. 183. Contributions to the 

 Cretaceous Palaeontology of the Pacific Coast; 

 The Fauna of the Knoxville Beds ; No. 134. The 

 Cambrian Rocks of Pennsylvania. United States 

 National Museum : Proceedings of. Gill, Theo- 

 dore : Note on Plectroplites and Hypoplectrodes, 

 Genera of Serranoid Fishes. Mearns, E. A. : Pre- 

 liminary Description of a New Subgenus and Six 

 New Species and Subspecies of Hares from the 

 Mexican Border of the United States. Rathbun, 

 Mary J. : Description of Two New Species of 

 Fresh-water Crabs from Costa Rica and the Genus 

 Callinectes. Ridgway, R. : Characters of a New 

 American Family of Passerine Birds, and On Birds 

 collected by W. L; Abbott, etc. 



Conger, C. B. Air-Brake Catechism. New 

 York : (256 Broadway) Locomotive Engineering. 

 Pp.95. 25 cents. 



Crehore, Dr. Albert C. Experimental Deter- 

 mination of the Motion of Projectiles inside the 

 Bore of a Gun with the Polarizing Photo-chrono- 

 graph. Fort Monroe, Va. : Artillery School Press. 

 Pp.84. 



Eckhoff , "William J. HerbarTs A B C of Sense- 

 Perception. (International Education Series.) 

 New York : D. Appleton & Co. Pp. 288. $1.50. 



Farnham, Amos W. The Oswego Method of 

 Teaching Geography. Syracuse : C. W. Bardeen. 

 Pp. 121. 50 cents. 



Frye, Alexander Everett. Home and School 

 Atlas. New York and London : Ginn & Co. 

 Pp.48. 



Gattermann, Ludwig. The Practical Methods 

 of Organic Chemistry. Translated by William B. 

 Shorber. New York and London : Macmiilan & 

 Co. Pp.329. $1.60. 



Hogan, Louise E. How to Feed Children. 

 Philadelphia : J. B. Lippincott Co. Pp. 236. 



Jackmann. Wilbur S. Nature Study and Re- 

 lated Subjects for the Common Schools. Chi- 

 cago : The Author. Pp. (text) 167 ; charts. 23. 



Lubbock, Sir John. The Scenery of Switzer- 

 land and the Causes to which it is Due. New 

 York and London : Macmiilan & Co. Pp. 371. 

 $1.50. 



Mathews, F. Schuyler. Familiar Trees and 

 their Leaves. New York : D. Appleton & Co. 

 Pp.320. $1.75. 



McMurry, Charles A. Special Method in Natu- 

 ral Science for the First Four Grades of the Com- 

 mon School. Bloomington, 111. : Public School 

 Publishing Company. Pp. 210. 50 cents. 



McPherson, Logan G. The Monetary and 

 Banking Problem. New York : D. Appleton & 

 Co. Pp.135. $1. 



Meyers. William J. An Inductive Manual of 

 the Straight Line and the Circle. Fort Collins, 

 Col.: William J. Meyers. Pp.113. 50 cents. 



Mourgues, L. La Epidemia de Fiebra Tyf oidea 

 en Iob Cerros Alegre i Concepci6n (The Epidemic 

 of Typhoid Fever in Cerros Alegre and Concep- 

 clon). Santiago de Chile : Cervantes. 



Musee Social (Social Museum). Bulletins. 

 Series A, Circulars 1 to 6. 8eries B, Circular 1. 

 Paris, France : Robert Pinot, Director General. 



Reprints. Brinton, D. G. : Left-handedness in 

 North American Aboriginal Art (American An- 

 thropologist, May, 1896). Dolley, C. S. : The 

 Planktonokrit ; a Centrifugal Apparatus for the 

 Volumetric Estimation of the Food Supply of Oys- 

 ters and other Aquatic Animals (Proceedings of 

 the Academy of Natural Sciences of Philadelphia, 

 May, 1896). English, W. T. : Cardiac Instability 

 due to Acid Auto-intoxication (Journal of the 

 American Medical Association, June 8, 1895), and 

 Should the Cardiopath Marry ? (Pittsburgh Med- 

 ical Review, April, 1895). Llano, A. : Morality 

 the Last of Dogmas (Philosophical Review, vol. 

 v, No. 4). Putnam, F. W., and Willoughby, 



C. C. : Symbolism in Ancient American Art (Pro- 

 ceedings of American Association for the Ad- 

 vancement of Science, vol. xliv, 1896). Smith, 

 H. I. : Notes on the Data of Michigan Archae- 

 ology (American Antiquarian, May. 1896). Ward, 

 Lester F. : Ethical Aspects of Social Science (La- 

 ternational Journal of Ethics, July, 1896). 



Richardson, B. "W. Biological Experimenta- 

 tion. New York : Macmiilan & Co. London : 

 George Bell & Sons. Pp. 170. $1. 



Russell, Ernest E. The Reason Why. New 

 York : E. E. Russell (13 Astor Place). Pp. 365. 



Russell, E. H. Child Observations. Boston : 



D. C. Heath & Co. Pp. 267. $1.50. 



United States Commissioner of Labor. Tenth 

 Annual Report, Vol. I, 1894 ; Strikes and Lock- 

 outs. Pp. 1873. 



United States Geological Survey, J. W. Powell, 

 Director. Fifteenth Annual Report, 1893-'94. 

 Pp. 755. Sixteenth Annual Report, Charles D. 

 W*alcott, Director, 1894- , 95. Parts H, HI, and rv. 

 Pp. 598, 645, and 735. 



ffraemjeuts of ^jcijetuce. 



X Rays in Surgery. Considerable ad- 

 vance has been made daring the past few 

 months in the application of the X ray to 

 surgical diagnosis, and it seems fairly certain 

 now that the trunk with its contents, as 

 well as the extremities, may be examined by 

 the use of this agent. A recent article in 

 the American Journal of the Medical Sci- 

 ences, by W. W. Keen, inoludes some re- 

 markably clear reproductions of X-ray pic- 

 tures, one of which shows very beautifully 

 all the bones of the trunk. Among much 

 interesting matter the article contains a sug- 



gestion which deserves at least a trial. The 

 difficulty with the present pictures is that 

 an exposure which is long enough to show 

 the bones blots out all detail in the soft 

 parts. Dr. Keen suggests the use of a 

 number of superposed paper films. The X 

 rays will act almost equally on them all, and 

 by withdrawing one at a time at short inter- 

 vals a series of pictures of the object will be 

 obtained which should show all the required 

 detail. An important improvement in the 

 Rontgen apparatus is said to have been 

 made by the General Electrical Company of 



