1919.] The Sixth Indian Science Congress. exli 
mobility or power of expansion—excluding a certain growth of 
roots and branches—is n 
e might then represent i it by this wet showing the 
variation of its mobility with time. (Fig. 1.) 
Bodily Range 
SEED PLant 
Scarrsnine Detoune Frowen 
Avteons vrunteR Senine Sunndah 
Fig. 1. 
Now let us suppose that the flowers of this plant have a 
th 
very attractive scent. We can then represent its nip ap 
ness by another similar curve, a ‘“‘smell-curve.” (Fig. 
Smett 
FrowenR 
Fig. 2. 
Now if we assume that the intensity of a smell diminishes 
more or less as does the intensity of light, inversely as the 
square of the distance from its source, its diminution with in- 
creasing distance will follow a course _ a taking the origin 
as being the source—the flower. (Fig. 
Then by combining these three sono we get a solid form 
showing the bodily and sensory extent of the plant at differ- 
ent periods of time, assuming for the sake of —— that 
only the flowers are attractive, and _ they owe their attrac 
tion entirely to their nice smell. ( Pl. I, fig. 1.) 
