SCIENCE 



Feidat, June 23, 1916 



CONTENTS 

 'Further Evidence that Crown Gall of Plants 

 is Cancer: Dr. Erwin T. Smith 871 



Establishment of a School of Hygiene and 

 Fublic Health by the BocTcefeller Founda- 

 tion 889 



Engineering Experiment Stations in the State 

 Colleges 890 



Scientific Notes and News 892 



University and Educational News 893 



Discussion and Correspondence :■ — 



Coral Beefs: G. E. Agassiz. Another Pois- 

 onous Claviceps : J. B. 8. Noeton. Names of 

 Celestial Elements: Psopessoe B. K. Emee- 

 SON 894 



Quotations : — 

 Engineering Experiment Stations in the 

 Land Grant Colleges 895 



Scientific BooTcs: — 

 Fisher on the Mathematical Theory of 

 Probabilities: Peofessob H. L. Eietz. 

 Gould's Practitioner's Medical Dictionary: 

 De. a. Alleman 896 



Proceedings of the National Academy of Sci- 

 ences 898 



Special Articles: — 

 The Scales of the Gonorhynchid Fishes: 

 T. D. A. COCKEBELL 899 



Anthropology at the Washington Meeting: 

 Peofessob George Geant MacCuedt 900 



UM. intoDdad for publiestioa stud books, etc.. iatended for 

 reriew should be sent to ProfesBor J. MoKeen Oattell, Qarriton- 

 On-Hodion. N. T. 



FURTHER EVIDENCE THAT CROWN 

 GALL OF PLANTS IS CANCERi 



Tumors without visible cause are the sub- 

 ject of this address. They have been 

 studied most numerously in man, but they 

 occur also in the domestic animals, in wild 

 animals (mammals, birds, batraehians, fish) 

 and now, as we know, in plants. If this 

 paper were given a full descriptive title it 

 would read as follows: Further Evidence 

 that Crown Gall is Cancer, and that Cancer 

 in Plants because of its Variable Form and 

 its Bactenal Origin offers Strong Presump- 

 tive Evidence Both of the Parasitic Origin 

 and of the Essential Unity of the Various 

 Forms of Cancer Occurring in Man and 

 Animals. This is the text I shall talk to, 

 and in passing I may add it is a view en- 

 tirely opposed to the current views of can- 

 cer specialists. 



To make plain what I have to say about 

 plant tumors of this type it will be neces- 

 sary briefly to mention similar animal 

 tumors. This I shall do without special 

 reference to medicine, i. e., simply from the 

 standpoint of a biologist, but first I shall 

 show you the gross appearance of a few 

 animal cancers. (Lantern slides.) 



These tumors without visible cause are 

 very common in man. They have been ob- 

 served in every organ and in every tissue of 

 every organ. They have been studied dili- 

 gently by human pathologists, and espe- 

 cially by morphologists, for many years and 

 there is now a great volume of literature 

 respecting their structure and course of 

 development, but very little is known as to 



1 Read before the Washington Academy of Sci- 

 ences, May 11, 1916. 



