December 8, 1922] 



SCIENCE 



669 



physdological activity. Thyroxin. (3) T]ie reac- 

 tion as a test for tliyrodd secretion. Grave 's 

 disease. 



Leucocytic secretions: Alexis Carrel (intro- 

 duced iby S. Flexner). 



Experiments loitJi an anti-serum for Mochy 

 Mountain spatted fever: Hideyo Noguchi (in- 

 troduced by S. Flexner). 



The protection of the newborn against infec- 

 tion: Theobald Smith. 



Experimental herpetic encephalitis : Simon 

 Flexner. 



Sydrohepatosis, a condition analogous to hy- 

 dronephrosis: Peyton Ecus (introduced by S. 

 Flexner). 



Crystalloidal solutions and colloidal suspensions 

 of proteins: Jacques Loeb. 



The ovary in connection with structural and 

 metabolic changes in mammals: Charles E. 

 Stockard. a general description is given of a 

 method of external examination by which tJie 

 several stages of the ovarian cycle may be defi- 

 nitely located. The moment of discharge oi the 

 ovum from the ovarian follicle may also be ac- 

 curately determined. The several stages of the 

 ovarian cycle may be experimentally modified and 

 ovulation temporarily or permanently suppressed. 

 The type of modification n;ay be recognized by a 

 study of the structural reactions of the uterus 

 and vag'ina which are indicated by the cellular 

 composition of smears collected from the wall of 

 the vagina. The ovai'y may be used as a very 

 exact and valuaible indicator for determining the 

 general metabolic eonditdons of the individual. 



The mechanism of selective bacteriostasis : 

 John W. Churchman (introduced by S. Flex- 

 ner). 



Tlie reduction division in haploi-d, diploid, trip- 

 loid and tetraploid daturas: John Belling and 



A. F. Blakeslee (introduced by C. B. Daven- 

 port). 



The consequences of different degrees of inter- 

 mensual correlation for fecundity in the domes- 

 tic fowl: J. Arthur Harris (introduced by C. 



B. Davenport). 



Secent studies on the relation of metabolism 

 to sex: Oscar Eiddle (introdueted by C. B. 

 Davenport). 



Sex and sex control in Cladocera: (By title.) 

 Arthur M. Banta (introduced by C. B. Daven- 

 port ) . 



The consequences of different degrees of inter- 

 ference, in the crossing-over of the hereditary 

 genes: H. S. Jennings. The paper gives the 

 general results of a mathematical study of the 



relations exhibited in the socalled crossing-over 

 of the genes, and compares these with those 

 bound to occur if the genes are arranged in 

 series and there is interference between breaks 

 at points near together in the series. The ob- 

 served ra;tioB fall into a peculiar and complex 

 system; by means of a mathematical formula it 

 is shown that this entire system, even to details, 

 is, an all essentials, a necessary result of the 

 serial arrangement mth a certain extent of inter- 

 ference. The marked ■changes that would result 

 from different extents of interference are like- 

 wise shoAvn. 



A new type of uroleptus formed by permanent 

 fusion of two conjugating individuals: Gary N. 

 Calkins. 



Restoration of fossil human remains its pos- 

 sibilities, v.alue and limitations: J. H. Mc- 

 Gregor (introduced by Edmund B. Wilson). 



The role of the golgi apparatus in the forma- 

 tion of the animal sperm: Egbert B. Bowen 

 (introduced by Edmund B. Wilson). 



The map of the third chromosome of Droso- 

 phila: T. H. Morgan and C. B. Bridges. 



Limiting values of the' size of- the genes of 

 Drosophila: T. H. Morgan. 



Ultraviolet flowers and their possible bearing 

 on the problems of pollination by insects: Frank 

 E. LuTZ and F. K. Eichtmyer (introduced 

 by Frank M. Chapman). The various col- 

 ors on the petals of fliowers and, indeed, the petals 

 tiliemselves are rather generally believed to have 

 arisen in connection with the pollination of flow- 

 ers by insects. A few experiments, including 

 some made recently, indicate "that insects respond 

 definitely to ultraviolet rays. This suggested an 

 investigation of the reflection by flowers of ultra- 

 violet i-ays. It was found that some flowers show 

 ultraviolet while others do not, just as some 

 show blue while others do not. If flower colors 

 are important in connection with pollination by 

 insects, its seems that not only the visible spec- 

 trum but also the ultraviolet should be con- 

 sidered. 



Secent discoveries of fossil vertebrates in China 

 and Mongolia: W. D. Matthew (introduced 

 by Frank M. Chapman). Important fos- 

 sil mammal faunas have been recently discovered 

 in China by the Chinese Geological Survey and 

 American Museum party. The American Mu- 

 seum's Asiatic Expedition has also been extraor- 

 dinarily successful in Mongolia this summer. 

 Three important mammal faunas, Eocene, Oligo- 

 cene and Pliocene were discovered, also a rich 

 Cretaceous dinosaoir fauna. Large collections 



