io6 
Journal of Agricultural Research vou xxin, no. a 
This seed container is in the form of an inverted crucible with a plate 
perforated with about 40 holes 1 mm. in diameter (G) inserted 5 mm. 
above the open base, and a ring at the top (H) by which, with the use 
of a bent needle or other suitable hook, to raise it or lower it in the tube 
(A). In one side of this inverted crucible is an opening (I), reaching 
from its top to 5 mm. above the perforated plate (G) and covering about 
120 angular degrees. 
The seed container rests upon nibs (K) pushed into the sides of the 
tube (A). The tall, slightly flaring top (L) of this tube provides for 
reinforcing the ground glass joint by a mercury seal. 
We have used this apparatus in three sizes of about 20-cc., 40-cc., and 
80-cc. capacity. The tube diameter of all three sizes is 3 cm., so that 
one size of seed container can be used for all. This simplifies their 
manufacture and makes them less expensive. With the smallest size, 
however, the nibs, which support the seed container in the other sizes, 
are replaced by a very low glass tripod, and the ring at the top of the 
