168 



SCIENCE. 



[N. S. Vol. II. No. 32. 



Potter's translation of Warming's ' Hand- 

 book of Systematic Botany '; Darwin's 

 ' Elements of Botany ' ; Lloyd's illustra- 

 tions of fungi ; MacDougal's ' Experimental 

 Plant Physiology '; Bailey's ' Horticultur- 

 ist's Pule Book '; Comstock's ' Manual for 

 the Study of Insects '; and Dewey's last 

 weed bulletin. In an Open Letter Professor 

 Hollick replies on behalf of paleobotanists 

 to Mr. Holmes' criticisms previously re- 

 ferred to. The number closes with four 

 pages of Notes and Neios. 



THE PSYCHOLOGICAL REVIEW, JULY. 



The Psychology of Pain. By Peofessoe C. A. 



Steong. 



In this article the author reviews the evi- 

 dence as to a sensation of pain, citing many 

 pathological cases. He concludes in favor 

 of pain as a sensation in addition to the un- 

 pleasantness which accompanies mental 

 contents. He does not incline, however, to 

 accept the view that sensation-pain has 

 separate nerve fibres of its own. 



Experimental Induction of Automatic Processes. 



By Peofessoe W. R. Newbold. 



A detailed experimental study of the 

 visual images induced by steady gazing 

 upon a shining surface, called ' crystal 

 vision.' Many new and interesting experi- 

 ences and variations are reported. The 

 author takes occasion, on the strength of 

 his experiments, to combat the theory of 

 subconscious trains of ideas or ' secondary 

 personalities ' to account for these phe- 

 nomena; holding that they can be explained 

 as complex responses of the lower centres 

 to stimulation. 



Sensory Stimidation by Attention. By Peo- 

 fessoe J. G. HiBBEN. 



Report of a case — a girl who could not 

 hear except when her attention was directed 

 to the source of the sound. The author dis- 

 cusses other cases of a similar kind and the 

 possible grounds on which a reinforcement 



might come to the sensory processes fi-om 

 the processes of attention. 



Shorter Contributions ; Discussions : includ- 

 ing a discussion on ' Shadows of Bloodves- 

 sels on the Retina,' by Mes. C. Ladd 

 Feankliij ; ' Tie New Psychology in Under- 

 graduate Work,' by H. K. Wolfe, etc., 

 followed by Psychological Literature ; Notes. 



PSYCHE, AUGUST. 



W. T. Blatchley gives notes on 38 of the 

 Heteroptera observed by him while winter 

 collecting in Vigo County, Indiana. Dr. 

 A. Davidson describes the habits of a Cal- 

 ifornian Stigmus, a wasp which stores its 

 cells with aphides and notices two parasites 

 bred fi-om the larvse, one of which is here 

 described by Ashmead. C. H. T. Town- 

 send describes the prickly leaf-gall of Rho- 

 dites tumidus on Rosa fendleri in New 

 Mexico. D. W. Coquillett records the oc- 

 currence of Acreotrichus in Washington 

 (State), a genus of Diptera heretofore 

 known only fi'om Australia, and describes 

 the species. A. P. Morse describes three 

 new species of North American Odonata of 

 the genera Nehalennia and Enallagma ; and 

 Miss C. G. Soule prints some miscellaneous 

 notes on moths. Brief proceedings of the 

 Cambridge Entomological Club follow. 



NEW BOOKS. 



Elements of Botany. Feancis Daewin. Cam- 

 bridge, University Press. 1895. Pp. vii-|- 

 235. $1.60. 



The Science of Mechanics. Eenest Mach. 

 Translated by Thomas J. McCormack. 

 Chicago, Open Court Publishing Co. 

 1893. Pp. xiv-l-534. 



Schneekrystalle. G. Hellman. Berlin, Ru- 

 dolf Miickenberger. 1893. Pp. 66. M. 6. 



Annual Report of the Geological Survey of Can- 

 ada, Vol. VL Ottawa. 1895. Pp.xH-212. 



Proceedings of the Iowa Academy of Sciences for 

 1S94, Vol. II. Des Moines. 1895. Pp. 222. 



