16 BULLETIN 1056, U. S. DEPARTMENT OE AGRICULTURE 
8 inches apart and stacking the sacks on these in the same manner. 
Such a plan also may be used advantageously in buildings or on 
floors constructed of any other material. 
A patented ventilating system, consisting of tubes 6 inches in 
diameter made of perforated sheet metal or of heavy ^-inch mesh 
wire, which are placed upright over holes cut in the floor about 
6 feet apart each way and which extend above the height of the 
walls of the building, has come into limited use in cottonseed ware- 
houses during recent years. When bulk seed is piled high in a 
building so equipped these tubes or " flues " provide a constant cir- 
culation of air. 
If more than one variety or strain of a variety is stored in bulk in 
the same warehouse, separate bins should be provided and each bin 
marked with the lot number (see p. 19) given to the particular 
strain or variety of seed stored therein. This arrangement will 
reduce the liability of varieties becoming mixed and identify the 
different lots. Some such means of identification is necessary be- 
cause it is difficult, and in most cases impossible, to distinguish 
between the varieties by the appearance of the seed. 
STORING IN SACKS 
Storing in sacks ' offers several advantages. Where the many 
phases of preparation are performed successively or as one con- 
tinuous operation and the seed sacked at the recleaner and grader 
there will be no occasion for storing in bulk. When sacked the 
seed may be moved or transferred at will and shipments made with 
the least possible delay. Also, when the bags are arranged in the 
warehouse in the manner described in the following paragraph 
injury to the germination by heating is not so likely to result as when 
stored in bulk. The bags should be stenciled immediately after 
sacking with the lot number assigned to this particular lot of seed. 
The best position for the stenciled number is across the top of the 
bag. In this position it will be visible when the bags are standing 
on end or when stacked or piled. All bags bearing the same lot 
number should be kept together and placed or stacked in the same 
section of the warehouse. 
STACKING 
In stacking it will be found advisable to alternate the position of 
the bags in each layer by placing a double row end to end in the first 
layer, and in the second or succeeding layer placing them parallel to 
each other and crosswise or at right angles to those in the first or 
preceding layer. This provides a stack or pile the width of the 
length of a bag and any desired height and length that the dimen- 
sions of the warehouse will permit. A space of at least 6 inches 
should be left between each stack or pile and between the bags and 
the walls. Such arrangements permits a free circulation of air and 
reduces greatly the possibility of heating. 
GERMINATION 
All other factors being equal, the value of a given quantity of seed 
is in direct proportion to the percentage that will grow. Regardless 
