Jv.VE T, 1895.] 



SCIENCE. 



(U3 



World's Columbian Exposition at Chicago. 

 This work is so costly and so inaccessible 

 that Dr. Geo. J. Pierce has translated the 

 paper into English, and. with the approval 

 of Professor Strasburger and the editor of 

 the work named, it is being published in 

 the Gazette. It is particularly valuable in 

 that it forms a supplement to Sachs's His- 

 tory of Botany, in a measure bringing it 

 down to date. The conclusion will aj)pear 

 in the June number. 

 The Embryo-sac of A-ster Xova-Anglia' : Chas. 



J. Chamberlaix. 



In this study of the sti'ucture of the em- 

 bryo-sac of one of the highest spermaphytes 

 the author shows that the formation of the 

 secondary nucleus of the sac has no relation 

 to a sexual process ; comments on the re- 

 markable uniformity in size of the nucleoli of 

 the egg apparatus and endosperm ; finds the 

 number of the antipodal cells varying from 

 2 to 13 and the number of nuclei in each 

 fi-om 1 to 20 or more : and, most remai-k- 

 able of all, announces that he has found an 

 undoubted egg in the antipodal region. 

 Present Problems in the Anatomy, Morphology 



and Biology of the Cactacew : "NVm. F. 



Ganoxg. 



Professor Ganong continues bis account 

 of these plants, in this concluding install- 

 ment indicating the problems connected 

 with the flowers ; the relation of form-con- 

 ditions to climate : the intei-nal anatomy 

 and its relation to external conditions ; the 

 newness of the familj- and its geographical 

 distribution ; and briefly discusses the bear- 

 ing of the solution of these problems on 

 adaptation and natural selection. 

 Some Recent Cell Literature : J. E. Humphrey. 



At the request of the editors Dr. Hum- 

 phrey has prepared a review of recent cell 

 literature and a summary of our present 

 knowledge of the nucleus and centrospheres. 



In Briefer Article--' Dr. C. R. Barxes notes 

 the retention of vitalitj' in the spores of 

 3[arsilia quadrifolia. whose sporocarps had 



been continuously for nearly three years in 

 95 per cent, alcohol; Mr. G. E. D.wexport 

 adds stations for his new New England 

 species, Aspiditim simidatum. which is likely 

 to be in many collections under the name 

 A. Thelypteri.i or A. Xoreboraceme ; Dr. J. C. 

 Arthur condenses a biographical sketch of 

 the late Dr. Joseph Scbrtvter ; and Miss 

 Alice E. Keexer notes that the peculiar 

 protection of the nectar gland in Collinsia 

 bicolor by the free Viearded tips of the wings 

 of the filaments is a good diagnostic char- 

 acter which occurs in no other Collinsia ex- 

 cept (less strikingly) in C. franciscana. The 

 Editorial is on the recent transfer of the 

 Xational Herbarium to the care of the 

 Smithsonian Institution. In Current Liter- 

 ature appear reviews of ' Field, Forest and 

 Garden Botany;' the second edition of 

 Spalding's ' Introduction to Botany :' the 

 ' Bushberg Catalogue and Grape Growers' 

 Manual ;' together with notices of several 

 short papers. The number closes with four 

 pages of Xofes and Xeivs. 



THE PSYCHOLOGICAL REVIEW. 



The Psychological Pevieic for May is devoted 

 to experimental work. The first article is 

 a ' Preliminary Eeport on Imitation ' bj- 

 Professor Josiah Eoyce. He reports the 

 first-fruits of an attempt to submit the imi- 

 tative functions to an experimental test by 

 giving adult subjects series of rhythmical 

 sounds, such as taps by an electric hammer, 

 which it is their task to reproduce exactly 

 in rhj-thin and sequence by second serie.s of 

 taps. He promises in a futtu-e communica- 

 tion to report on the results, which he finds 

 sufficiently encouraging. The main body 

 of this paper is further devoted to an acute 

 di.scussion of the definition of imitation and 

 the demarcation of the truly imitative func- 

 tions. A large part of the number is taken 

 up by a series of • Studies from the Prince- 

 ton Psjehological Laboratory." by J. Mark 

 Baldwin. H. C. "Warren and W. J. Shaw, 



