399 
summarised such details, but among the later ones there are some 
who neglect all this, and who are not even concerned with the 
popular names of their plants. They invert the adage “non scholae 
sed vitae” and are not concerned with the utility of their writings 
8. 
chemical constituent occur. We may further suppose that in 
questions of microscopical technique, of plant physiology, culti- 
vation, &c., chemistry will be consulted more readily and to better 
advantage if it is found side by side with botany. I consider it a 
special disadvantage that the chemist who examines plants or parts 
of plants without botanical guidance and far from a_ botanical 
centre, so easily remains uncertain as to the true name and nature of 
his material, “What is indeed the use of examining a root or a bark 
or any other material under a false name (which afterwards leads to 
confusion) or of analysing material of which the botanical origin is 
not known? Such work resembles that of medieval monks and 
cannot be utilised in comparative phytochemistry. 
It has just been remarked that the chemical investigation of 
plants must begin in a botanic garden. When the elementary 
data concerning the presence or absence of special plant subtances 
i a given genus or species have once been obtained, the continua- 
had already previously ge 
i i i lem. As regards the 
material either at Buitenzorg or at Haar rega 
plant substances with which this preliminary a ye 
chiefly concerned, I paid most attention to the distribution 
’ alkal further looked especially for 
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