338 Biologie. — Varietäten, etc. — Physiologie. 



de l'interpretation biologique du regme stylaire des Composees 

 avaient d^jä ete comprises par Cassini, dont les donnees etaient 

 tombee dans l'oubli. Matouschek (Wien). 



Pearl, R. and J. M. Bartlett. The Mendelian inheritance 

 of certain chemical characters in maize. (Zschr. ind. Ab- 

 stamm.- u. Vererb. -Lehre. VI. p. 1-28. 1911.) 



In a cross between a white sweet (cT parent) race and a yellow 

 dent starchy (? parent) race determinations were made by direct 

 analysis of the percentage content of the grains of the pure parent 

 races and the F^ and F2 progeny in respect to the following chemi- 

 cal constituents: Moisture, nitrogen and protein, crude fat (ether 

 extract), ash, crude fiber, pentosans, sacrose, dextrose, total sugars, 

 starch. The results show that these chemical characters are inheri 

 ted in essential accordance with Mendelian principles, exhibiting 

 the phenomena of dominance and recessiveness and segregation. A 

 table Shows the dominant and recessive conditions of these charac- 

 ters in the cross studied. Analysis of the results leads to the con- 

 clusion that probably each of the characters protein, crude fat and 

 ash content segregates as a definite and distinct unit cbaracter, 

 separate from all others. The same thing appears to be true of the 

 characters crude fiber and pentosans, though because of the diffi- 

 culty of obtaining entirely reliable analytical data for these charac- 

 ters it is not possible to reach so high a degree of probability with 

 these characters as with the others mentioned. Sugar and starch 

 content are known from direct Observation to behave as distinct 

 Unit characters. The analytical data of the present paper support 

 this conclusion. Matouschek (Wien). 



Rodway, L., Notes on a graft Hybrid. (Proc, Roy. Soc. Tas- 

 mania. 1915. p. 108-109. 1 fig. Issued Feb. 1916.) 



This is an account of an apple which was picked from a Roman 

 Beauty tree grafted on a Senator stock. One half of the apple was 

 typically Roman Beauty, the other half Senator. The division was 

 longitudinal and sharply defined. This apple was the only one on 

 the tree influenced in this way. 



The author does not consider that Reversion, Cross PoUination 

 er Mutation would account for the phenomenon and believes the 

 Senator stock to be entirely responsible. He attributes it to a vita- 

 listic cause and considers that it is due to a migrating nucleus. 

 This nucleus is freed when a wound is made in the stock; when 

 the scion is bound to the stock and a steady transpiration current 

 is set up in the vessels, the free nuclei might be carried up to the 

 growing point. If the vitality of the nuclei has been retained they 

 would assert their presence and produce the characteristic form of 

 variety from which they came. M. N. Owen (Kew). 



Fred, E. B., Relation ofgreen manures to the failure of 

 certain seedlings (Journ. agr. Research. Washington V. p. 

 1161-1176. 1916.) 



In this paper a rather extensive study is published about the 

 effect of green manures on germination of seeds. In determining 

 the percentage of germination, only those seedlings that appeared 

 above the surface are recorded. The amount of green manure used 



