262 Varietäten etc. — Physiologie. 



Stoll, H., Weizenbastard. (Deutsche landw. Pr. p. 144. 4 Abb. 1910.) 



Eine Triticum Winterform, welche seit 5 Jahren konstant war 

 und einer Bastardierung von Triticum sativum turgidum, Sorte Ri- 

 vetts bearded mit Triticum sativum Spelta, Sorte roter Tyroler, 

 entstammt, wurde als ? verwendet, eine Sommerform des polni- 

 schen Weizens Triticum. polonicum als ^f. Die erste Generation 

 zeigte bei Spelzenfarbe, Form der glumeae und paleae Mittelbildung, 

 die Behaarung der Spelzen des Triticum polonicums dominierte, 

 ebenso wie der hohle Halm von Triticum vulgare. In der 2. Gene- 

 ration brachte die Bastardierung durchaus begrannte und auf den 

 Spelzen behaarte Formen. Bei Herbstsaat überwinterten nur 8 Indi- 

 viduen von 200, bei Frühjahrssaat schossten nur 192 von 329. Bei 

 den geschossten erschien der hohle Halm bei 139 Stück, gegen 53 

 Individuen mit markhaltigem wie er bei Triticum polonicum vor- 

 handen ist. Fruwirth. 



Ganong, W. F., Plant Physiology. (Henry Holt & Co., New 

 York. 265 pp. 1908.) 



A book intended as a hand-book of information upon those 

 phases of plant physiology having educational interest, — as well 

 as to serve as a text for a laboratory course for students. Conse- 

 quently it is more than the mere listing of experiments with direc- 

 tions for performing them. The place of plant physiology in any 

 System of education is considered, and the best means of treating 

 it in a coUege course is pointed out. Some of the errors in teaching 

 and learning this subject are discussed in detail, as are certain 

 other pedagogical questions, and there are chapters on the green- 

 house, laboratory, apparatus and materials for plant physiology. 

 The major part of the book is devoted to an outline of an experi- 

 mental course and is prepared with the idea of serving as a guide 

 to those working independently as well as for the Student under 

 instruction. There are two divisions, — the first dealing with the 

 structure and properties of protoplasm of planls, is considered 

 under the heads, 1. Physical structure and properties. 2. Chemical 

 composition. 3. Vital structure and properties. 4. Reactions of proto- 

 plasm to external forces, and 5. The building of organisms by pro- 

 toplasm. The second division is devoted to the physiological pro- 

 cesses of plants, taking them up under the heads of nutrition, 

 increase and adjustment. The plan of treatment under each of 

 these subjects is, a brief discussion of the general topic, then a 

 Statement of the problem in question form, followed by the experi- 

 ment with notes on materials, precautions, demonstrations, etc. 

 Much emphasis is laid upon the literature of the subject and nume- 

 rous citations and quotations are given. An especial feature of the 

 book is the description of the "normal apparatus" to be used , — 

 much of which is new or improved. The third part of the book is 

 devoted to manipulation and tables and brings together in compact 

 form the essential imformation of this character. There are nume- 

 rous text figures and some full-page illustrations. Trelease. 



Osbopne, Th. B. und S. H. Clapp. Hydrolyse des kristalli- 

 nischen Globulins des Kürbissamens {Cucurbita maxima). 

 (Zeitschr. analyt. Chem. IL. p. 146. 1910.) 



Die Resultate der Hydrolyse, berechnet auf wasser- und aschen- 

 freie Substanz, sind folgende: 



