316 MR. H. A. HURST ON STARCH GRANULES. 
“This view derives confirmation from the fact, that the 
deeper marking of some striz, when the granule is under 
the influence of acids or alkalies, is evidently caused, not 
by its own increase in depth or thickness, but by the ex- 
pansion of the membrane in which it is deposited, each 
side clearly separating it further from the adjacent striz ; 
while the moment the extension of stellate fissures allows 
lateral expansion of the granule no further deepening of 
striz is observable. 
“I therefore consider the starch granule to be consti- 
tuted of an enveloping membrane, or shell, of very firmly 
consolidated starch, enclosing a certain amount of the 
same substance in an amorphous condition and a more lax 
state, while the hilum, or nucleus, would, according to my 
view, be merely an aperture.” 
At the conclusion of this Paper some discussion took 
place as to the effect of various chemical reagents on the 
starch granule, and also as to the possibility of producing 
sections of them. The President suggested that the same 
method might be applied to the starch granule as was 
used to obtain sections of hairs, &c., that of mixing the 
granules with glue or Canada balsam, and, when hard, 
grinding the mass down to a thin layer. 
