ON THE EXPERIMENTAL STUDY OF HEREDITY. 177 



The investigations into the inheritance of colour in Primula sinensis 

 have been carried further, and attention has been paid to the genetics 

 of parti-coloured and flaked types. Experiments bearing upon the 

 special relations which are found to exist between certain distinct 

 factors have given interesting results, 1 and are being carried further. 



The inheritance of an abnormal type of flower in the wallflower is 

 being investigated, and experiments are also being made with a putative 

 hybrid between two species of Taraxacum. 



Mrs. Thoday has continued her experiments on the nature and 

 inheritance of the yellow tinge in the sweet pea/ 



Botanical Photographs. — Report of the Committee, consisting of Professor 

 F. W. Oliver {Chairman), Professor F. E. Weiss {Secretary), Dr. 

 W. G. Smith, Mr. A. G. Tansley, Dr. T. W. Woodhead, and 

 Professor E. H. Yapp, for the Registration of Negatives of Photo- 

 graphs of Botanical Interest. 



In accordance with the wish expressed by the Committee of the 

 Botanical Section at the Sheffield Meeting of the Association, the second 

 list of photographs collected by the Committee has been printed and 

 distributed to the botanical members of the Association. This list 

 includes mainly single plants or groups of plants, either in their natural 

 habitat or under cultivation. Owing to special circumstances it has 

 been impossible this year to prepare and publish a list of the ecological 

 photographs which have so far been collected. It is hoped that this 

 may be done next year, and with this object in view the Committee 

 ask to be reappointed. 



Mental and Physical Factors involved in Education. — Report of the 

 Committee, consisting of Professor J. J. Findlay {Chairman), 

 Professor J. A. Green {Secretary), Professors J. Adams and E. P. 

 Culverwell, Mr. G. F. Daniell, Miss B. Foxley, Mr. J. Gray, 

 Professor K. A Gregory, Dr. C. W. Kimmins, Mr. W. 

 McDougall, Dr. T. P. Nunn, Dr. W. H. K. Eivers, Professor C. 

 Spearman, Miss L. Edna Walter, and Dr.F. Warner, appointed 

 to inquire into and report upon the methods and results of research 

 into the Mental and Physical Factors involved in Education. 



The following were co-opted to the Committee: Dr. G. A. Auden, 

 Sir Edward Brabrook, Dr. W. Brown, Dr. C. P. Lapage, Mr. H. S. 

 Lawson, Dr. C. S. Myers, Dr. F. C. Shrubsall, Mr. H. Bompas 

 Smith, and Mr. A. E. Twentyman. 



The Committee have conducted an inquiry during the past year on 

 the tests actually in use and to be used in the diagnosis of feeble-minded 



i Proc. Roy. Soc, Sec. B, vol. 84, p. 13, 1911. 

 2 Proc. Cambridge Phil. Soc., vol. 16, p. 71, 1910. 

 1911. N 



