114 Messrs Wood and Berry, Selection of seed, etc. 



Mr Smith kindly allowed 120 of his own selected mother roots 

 to be cored for determination of dry matter. The results are 

 shown in the accompanying diagram (fig. 4), which shows that 



the variation of individual swedes is similar in every way to 

 the variation among individual mangels. Seed will be grown 

 separately from several selected roots as in the case of the 

 mangels. In the meantime a further investigation is proceeding 

 into the composition of the dry matter of the different varieties. 

 The diagram also shows the variation in percentage of dry matter 

 in 100 kohl rabis kindly presented by Mr Smith Rowley of 

 Histon. They too vary just as the mangels, and the best roots 

 have been picked out for growing seed. 



The authors wish to express their thanks to Professor Middleton 

 for advice in the conduct of the work, and for placing at their 

 disposal the resources of the University Farm, to Mr Henry Giles, 

 the superintendent of the field experiments of the Norfolk 

 Chamber of Agriculture, and Mr H. Henshaw, manager of the 

 University Farm, for the care they took in attending to the 

 growing of the roots, to Mr J. Goodchild, B.A., of Clare College, 

 who has sampled all the roots, and to Messrs S. F. D. Harwood, 

 B.A., of St John's College, and W. Cartwright, B.A., of Clare 

 College, who have given assistance when the samples came in too 

 rapidly to be dealt with by the authors themselves. 



