SCIENCE 



Editoeial Committee : S. Newcomb, Mathematics ; E. S. Woodwaed, Mechanics ; E. C. Pickeeing, 



Astronomy; T. C. Mendenhall, Physics; E. H. Thueston, Engineering; Iea Eemsen, Chemistry; 



J. Le Conte, Geology; "W. M. Davis, Physiography; O. C. Maesh, Paleontology; W. K. Beooks, 



C. Haet Meeeiam, Zoology; S. H. Scuddke, Entomology; C. E. Bessey, N. L. Beitton, 



Botany; Hexey F. Osboen, General Biology; C. S. Minot, Embryology, Histology; 



H. P. BowDlTCH, Physiology; J. S. Billings, Hygiene ; J. McKeen Cattell, 



Psychology; Daniel G. Beinton, J. W. Powell, Anthropology. 



Friday, July 29, 1898. 



CONTENTS: 



A 3Iemenio of Profe^sar Edward D. Cope : Peofes- 

 soE Chaeles S. Minot 113 



Beceni Experiments on Certain of the Chemical Ele- 

 ments in Relation to Heat: Peofessoe W. A. , 



TiLDEN 114 



Preliminary Note on the Growth of Plants in Gyp- 

 sum : T. D. A. COCKEEELL 119 



The Cross-ratio Group of 1^0 Quadratic Cremona 

 Transformations of the Plane: De. H. E. 

 Slaught 121 



The Conference of Science Teachers in the Trans- 

 Mississippi Educational Convention : Peofessoe 

 Chaeles E. Bessey 123 



Current Notes on Anthropology : — 



T!ie Beginnings of Slind; 31ushroom-shaped Im- 

 ages; American Indian Games: Peofessoe D. 

 G. Beinton 126 



Scientific Notes and News : — 



Preventive Inoculation against Plague; An Ex- 

 hibit of the History of Medicine; General 127 



University and Educational News 132 



Discussion and Correspondence : — 

 3Iiocene Edentates : Peofessoe S. W. Willis- 

 ton 132 



Scientific lAteratv/re: — 



Pinet and Henri on La fatigue intellectuelle : 

 Peofessoe Joseph Jasteow. Engler's Sylltibus 

 der PJlanzenfamilien : PEOFESSOE L. M. Undee- 

 WOOD. Ziegler's Text-book of Special Pathological 

 Anatomy : Peofessoe Simon Flexnee 132 



Societies and Academies : — 



Zoological Club of the University of Chicago: 

 V. E. McCaskill, De. C. M, Child 140 



New Poolcs 140 



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

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

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



A 3IEMENT0 OF PROFESSOR EDWARD D. 

 COPE. 



During the winter of 1894 Professor 

 Cope visited my laboratory, and we had a 

 somewhat prolonged discussion of evolu- 

 tionary problems. During this conversa- 

 tion I asked him concerning his views as to 

 the actual phylogeny of the mammalia. 

 This led to his writing down on a large 

 sheet of paper the interesting table of de- 

 scent which is herewith reproduced in fac- 

 simile (p. 114). 



It was written out under the guidance of 

 question and answer, but I think it will be 

 clear in spite of some apparent confusion. 

 The groups Sirenia and Cetacea he would 

 express no opinion about, and they were 

 jotted down where there happened to be 

 space on the paper, but with no indication 

 of their afifinities. In response to a ques- 

 tion concerning the Proboscidea he de- 

 clared that they had no close affinity with 

 the Anthropoid group, which he marked off 

 with an irregular line which collates in one 

 group the Anthropoidea and Condylarthra. 

 A similar question in regard to the Cheirop- 

 tera led to a line being added to separate 

 the Cheiroptera from a group which com- 

 prises the Insectivora, Creodonta, Fillodonta 

 and Tfeniodonta. Professor Cope consid- 

 ered the mammalia as of single and not 

 multiple descent. Of course, he did not 

 regard the living Marsupials and Mono- 



