128 Master Minds of Modern Science 



it is filled with straw which is soaked in petrol and fired. 

 The shed is red hot when the fire dies down, and it is fairly 

 safe to say that the germs have all been destroyed. 



Sir Daniel Hall, who has very kindly provided most 

 of the material for this chapter, was originally a young 

 chemist interested in gardening. In 1890 he began his 

 career by lecturing on matters of interest to farmers. In 

 1894 he was appointed first principal of the well-known 

 agricultural college at Wye, and, as he says, he has grown 

 up in the movement. 



He became a director of the Rothamsted Experimental 

 Farm, about which he has written a most interest- 

 ing book, and during the War he was brought by Lord 

 Prothero into the Ministry of Agriculture. At present he 

 spends a good deal of his time in the interesting garden at 

 Merton where Mr J. B. S. Haldane carries out his plant 

 experiments. 



Some of the data in this chapter are the result of the 

 work of Mr R. Borlase Matthews, of Greater Felcourt, 

 himself a distinguished scientist, to whom also we offer 

 our acknowledgments. 



