542 



SCIENCE 



[Vol. LV, No. 1429 



use of it in support of their contention of 

 having produced in the chicken a serum lytic 

 for the eye lens of the rabbit, with which re- 

 sults of great biological significance were ob- 

 tained. 



The serum of chickens which had been treated 

 with rabbit lens was injected into the circula- 

 tion of pregnant rabbits. A few of the young 

 of these rabbits had an eye defect which was 

 passed on to succeeding generations. It was 

 contended that the eye defect was in all prob- 

 ability due to the cytolytic action of the 

 chicken serum since chickens are known to be 

 good cytolysin (hemolysin) producers. 



We have treated chickens with the red cor- 

 puscles from a number of animal species. In 

 no case was any marked increase in the lytic 

 properties of the serum from the treated birds 

 evident. It was found in fact that fresh 

 chicken serum renders rabbit corpuscles non- 

 antigenic for guinea pigs, which accounts for 

 the failure to produce any marked increase 

 in the sensitizer content of the chicken. 



In the light of our observation on the pro- 

 duction of hemolysins in the chicken, it seems 

 improbable that Guyer and Smith produced 

 in this species a serum lytic for the eye lens 

 of the rabbit. At least the conclusion that 

 cytolysins must have been formed in the 

 chickens treated with the rabbit lenses be- 

 cause of the readiness with which this species 

 produces cytolytic sera, is not tenable. 



EoscoE R. Hyde 

 Depaktment op Immunology, 

 School of Hygiene and Public Health, 

 The Johns Hopkins University 



THE AMERICAN ASSOCIATION FOR 



THE ADVANCEMENT OF SCIENCE 

 TUCSON MEETING OF THE SOUTHWESTERN 

 DIVISION 

 The second annual meeting of the Southwestern 

 Division of the American Association for the Ad- 

 vancement of Science was held at the University 

 of Arizona on Thursday, Friday and Saturday, 

 January 26, 27 and 28, 1922. The meeting was 

 opened by President A. E. Douglass in the chair, 

 who, after a welcome and announcements, pro- 

 ceeded with the papers of the physical science 



section in open meeting. These were followed 

 by biological papers in the afternoon. In the 

 evening the president's address was given upon 

 the subject, "Some aspects of the use of annual 

 rings of trees in the study of climate. ' ' This 

 meeting constituted the formal opening, with ad- 

 dresses of welcome from the acting mayor of 

 Tucson, the president of the Chamber of Com- 

 merce, and the acting president of the university. 

 These were responded to by Dr. E. C. Prentiss, 

 the chairman of the executive committee of the 

 Southwestern Division, who was followed by Dr. 

 D. T. MacDougal, introducing the speaker of the 

 evening. This address was followed by the recep- 

 tion to tlie visiting members given by. the Faculty 

 Club of the University of Arizona. 



On Friday morning a special reception was 

 given to Seiior Ing. Ignacio Salas and his secre- 

 tary, Senor H. Irigoyen, representatives of the 

 minister of public works of the Mexican govern- 

 ment. These guests were introduced by Dr. D. T. 

 MacDougal, general secretary of the American 

 Association. They responded by speeches in 

 Spanish and in English. 



The papers of Friday morning dealt with the 

 social sciences, including history and archeology. 



The biological papers were continued at 1:45 

 P.M., and at 2:45 Dr. Henry B. Ward, of the 

 University of Illinois, gave a lecture entitled 

 ' ' The struggle between man and wild life in 

 North America" before a joint meeting of the 

 Sigma Xi Club of the University of Arizona with 

 the Southwestern Division, to which also a spe- 

 cial invitation had been extended to the Pima 

 County Teachers' Institute then in session. This 

 was followed by a trip about the campus of the 

 university ^vith visits to the observatory, engi- 

 neering, physics and research exliibits, and the 

 museum. In the evening Dr. Edgar L. Hewett 

 of Santa Fe gave an illustrated lecture upon 

 "Native American artists" to a joint meeting 

 of the Arizona Archeological and Historical Soci- 

 ety Tiith the Southwestern Division. This was 

 followed by a reception in the museum and an 

 exhibit of wireless telephone. 



On Saturdaj' morning the three sections were 

 in session simultaneously throughout the morning, 

 except that at 11 o'clock a business meeting was 

 held in which Dr. D. T. MacDougal was elected 

 president of the division for the coming year, 

 and Dr. A. E. Douglass was elected a member of 

 the executive committee. A Yaqui Indian dance 

 was presented in the Yaqui village near Tucson 

 from 2 to 4 in the afternoon, followed b}' visits 



