68 THE MICROSCOPE. May 
tangular symmetrically arranged layers of cells (c¢) are 
filled with gluten. The entire interior (d) is filled with 
cells of irregular shape containing starch, and it is of 
this that the finest wheat flour is made, The gluten cells 
are excluded in the milling because they are of a darker 
color, but chemical analysis shows that the ‘‘whole wheat” 
flour is more nutritious and wholesome although darker 
in color. 
Enclosures. 
By W. S. BEEKMAN, 
WEST MEDFORD, MASS. 
Calcite is one of the most fantastic minerals we have 
in our cabinets. We find it in every conceivable style, 
color, and aggregation. Its chemical composition may 
remain constant, and its crystals may be assigned to 
two systems; yet its magical power of assuming states 
of endless variety of combination of the two; and mag- 
nificent aggregations belonging to neither crystalline nor 
amorphous, is amazing. The magnificent unfoldings of 
Flos-ferri peculiar to certain districts; the metamorphic 
action distorting it in others; the comb-like crystalline 
forms in other places, afford many fine specimens. 
For the microscope, however, but few varieties in their 
natural state, offer much that can be considered advanta- 
geous for study. To be sure, the fragments which occur 
on breaking up certain English specimens, whose minute 
crystals are bedecked with a profuse sprinkling of irri- 
descent pyrite, are well-known among exquisite opaque 
mounts. The study of the mineral inclusionsis an inter- 
esting one, and in calcites from the famous Joplin finds, 
whose finest golden crystal weighed one hundred pounds 
we occasionally find an inclusion that is very interesting. 
It isto be noticed in certain specimens of these transpar- 
ent calcites, capable of showing double-refraction, that 
the molecular forces have arranged a series of marcasites 
