116 



SCIENTIFIC AGRICULTURE. 



December, 1921. 



The Fj generation resembled the awn- 

 less parent so closely that it was at first 

 thought that the cross had missed. From 

 the one poor plant harvested 27 beardless, 

 7 hooded and 7 awned were obtained. On 

 some of the awnless plants small barbs 1 

 cm. in length were found. This being un- 

 expected, it was thought that the parent 

 might have been a heterozygote. Un- 

 fortunately, the plants were not kept track 

 of and the author states that new work 

 will have to be taken up. 



Some other minor characters noted. 



Long g; ained forms crossed with short 

 grained gave long grained forms in F^ 

 generation and an excess of long forms in 

 Fo. The broad ribbon-like awns in certain 

 varieties like Japanicum, Himalayeuse and 

 Paralleuum are dominant over narrow 

 forms which occur in most barleys. Slight 

 awns are dominant over lack of awns. The 

 bristlv form of rachilla in Goldthorpe is 



dominant over smooth rachilla as in Che- 

 valier. 



Conclusion. 



It can be readily seen how little is really 

 known on a lot of points in barley breed- 

 ing and how much has yet to be done : how 

 much difference cf opinion there is on 

 some matters depending on the view points 

 of various workers. The appended table 

 gives the generally accepted dominant 

 characters. 



Black colour in 



palea 

 Two-rowed 

 Hoods 



Purple palea 

 Coloured grain 

 Narrow glumes 

 Lax Ears 

 Adherent palea 

 Brittle rachis 

 Awnless 

 Rough awns 



dominant over White Colour. 



dominant 

 dominant 

 dominant 

 dominant 

 dominant 

 dominant 

 dominant 

 dominant 

 dominant 

 dominant 



over Six-rowed, 

 over Awns. 

 over White palea 

 over colourless, 

 over Broad, 

 over Den^e Ears. 



over Non -adherent 

 over Tough rachis. 



over Hooded, 

 over Smooth Awns. 



American Association for the Advancement of 

 Science and Associated Societies 



Meets in Toronto, December 27 to 31, 1921. 



The seventy-fourth meeting of the Am- 

 erican Association for the Advancement of 

 Science will be held at Toronto. Canada, 

 by invitation of the University of Toronto 

 and of the Royal Canadian Institute. While 

 it is not to be expected that the To.onto 

 meeting will attain the great magnitude 

 and complexity that characterized the re- 

 cent Chicago meeting, yet it is certain to 

 be exceptionally satisfactory in many 

 ways. Not being one of the larger, four- 

 yearly meetings which are scheduled to 

 occur in rotation, at Chicago. Washington, 

 and New York, the second Toronto meet- 

 ing will Ve less crowded than are the larger 

 meetings. Its program will be simpler, 

 witli fewer serious conflicts. It will excel 

 especially in opportunities for personal 

 and .social contact among those in attend- 

 ance, a very desirable and valuable feature 

 of the Association meetings that is neces- 

 sarily partially thrown into the back- 

 ground at the great four-yearly meetings. 



It may be safely predicted tliat the se- 

 venty-fourth meeting will be exceptionally 

 interesting and inspiring on account of its 



international character. More Canadian 

 men of science will attend than is usual for 

 meeetings held south of tjie international 

 boundary, and the scientific workers of the 

 two great English speaking nations of 

 North America will here have opportunities 

 for becoming even better acquainted than 

 the}^ noAv are, and for strengthening the 

 bonds of mutual understanding and of 

 personal and national friendship. Arran- 

 gements are in progress whereby, it is 

 hoped, several British scientists may be 

 present and give addresses at the various 

 sessions of the second Toronto meeting. 



The President of the Association for 

 this year is Professor Eliakira H. Moore, 

 of the University of Chicago, one of the 

 distinguislied mathematicians who have 

 given American mathematics its prominent 

 place in world science. Professor Moore 

 will preside at tlie opening session, Tues- 

 day evening, December 27, at which Doc- 

 tor L. 0. Howard, of the United States 

 Depa: traent of Agriculture will present his 

 address as retiring president of the Asso- 

 ciation. Dr. Howard is well known to 



