FAT. 105 
rule, dissolved in the cell-sap (red potatoes, red foliage leaves 
and petals). 
In the fundamental protoplasmic mass, there is very frequently 
found liquid or solid fat, for instance, in the embryo of the Gra- 
mine, in the endosperm of Ricinus, and in the cotyledons of the 
Crucifere. The fat appears to be combined with the proto- 
plasm in the finest state of division. Microscopical sections of 
seeds which are very rich in fatty oil (Ricinus, Tiglium, Amyg- 
dalus, Corylus) show, when observed under water, a number of 
small oil-drops, which are not visible when alcohol or glycerin, 
instead of water, is used as the mounting medium. It is only 
after gradually diluting the alcohol or glycerin under the cover- 
IR: (30? LG 
sin ve. 
(LAYS 
Fig. Gon! coloring matters (anthoxanthin bodies) from flowers and fruits 
Tschirch). 
glass with water, that the oil-drops are brought to view. From 
this it may be concluded that the fatty oil is contained in the 
dry seed in combination with another substance, which pre- 
vents the oil from flowing together in drops. This evidently 
very loose compound (perhaps containing albumen) is destroyed 
by water, and the oil then unites in the form of drops. 
This result may, however, be so interpreted that the fatty oil 
occurs in the cells very intimately mixed with the protoplasm, — 
that the albuminous body mixed therewith becomes dissolved 
by the water, and that thus the oil is caused to form larger 
drops. However this may be, the fatty oil is evidently very 
effectually protected by this highly remarkable manner of 
