1922.) Indian Science Conyress. LB. Tit 
by the large proportion of genetics papers on our present 
programme. Much valuable work has been done at the vari- 
suitable for particular needs and local conditions. The results 
will be of increasing use in developing new stable combina- 
tions in future breeding experiments. All observers of plants 
should be constantly on the watch for mutations of all kinds. 
We have only to recall that the novel orange industry of Cali- 
fornia arose from a mutation discovered in a single tree in 
Brazil. 
It cannot yet be said that the method of evolution has 
been discovered. But we should remember that the concept 
of mutation got its great start from DeVries’ study of a mere 
eed. Who shall say that in our vast flora there is not some 
plant or plants which when carefully studied will yield equally 
striking results ? 
‘I want to go no further than to emphasize the far-reaching 
practical importance of genetics to our problems of agri- 
culture, and to urge greater activity in the subject. 
PLant PATHOLOGY. 
Plant pathology is mainly the application of knowledge 
i. The importance with which the subject is 
Considerable work has been done in India, especially in the 
agricultural research institutes and agricultural departments. 
Departments of botany in our colleges and universities have 
as yet made little contribution to the subject. The work of 
Butter ! stands as an inspiration to all interested in pathology. 
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diseases in India. An examination of BUTLER § 
that this process has already begun. A considerable number 
of important diseases have been found in India for the first 


ees Caleutta, 1918, Also 
' Burirr, E.J. Fungi and Disease in Plants. 
numerous memoirs. ; 
