New York AGRICULTURAL EXPERIMENT STATION. 379 
fortunately, the writer has not yet made tests to establish or 
disprove these hypotheses. 
So important is it to distinguish between the apparent specific 
gravity of the seed and the specific gravity of that which is of 
importance to the plant, 7. e., the structural parts in which re- 
serve material is stored, that further studies were made on this 
point, using material convenient of manipulation. The specific 
gravities of several buckwheat seeds were determined and then 
the hulls were removed and the specific gravities were again 
taken. The records of these determinations are shown in the 
following table: . 
TABLE X VII.— Speciric GRAVITIES OF BUCKWHEAT KERNELS IN 
THE NATURAL CONDITION AND WITH THE OUTER SEED CoATS 
REMOVED. 
Sp. gr. of entire seed. Sp. gr. of seed with testa removed. No. of seeds. 
1.23 1.30 al 
1.22 <1.30 2 
1.30 2 
1.28 3 
1.21 1.30 1 
1.28 1 
1.20 <1.30 1 
1.30 1 
1.29 2 
1.27 1 
25 2 
1.24 1 
9 
1.18 =I oa t Small seeds. 1 
1 WP 1 
1 ey Large seeds. 2 
125 1 
1.14 1.28 2 
1.24 1 
1.22 i 
1.07 1.25 1 
1.23 2 
1.22 1 
<1.00 eli 1 
From this table it appears that the specific gravity of the ker- 
nel follows in a general way that of the entire seed; or in other 
words, the specified gravity of the entire seed in indicative in a 
general way of the specific gravity of the kernel within. It ap- 
pears also from the one set of observations recorded above, that, 
given two seeds of the same specific gravity, the one large and 
the other small, the kernel of the small seed is the more compact 
or else has a larger percentage of the heavier reserve materials 
in it, 
