138 Report oF NEw YorK AGRICULTURAL EXPERIMENT STATION. 
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removal by sifting they may be divided into two kinds; viz., 
small-seeded dodder and large-seeded dodder. Fortunately, the 
large-seeded kind is much the less common. Both kinds may be 
removed by sifting, but the large-seeded kind requires more 
care and a second sifting is recommended if it is abundant. The 
Station will furnish free samples of dodder seed upon request. 
Since the farmer has no means of determining whether he is 
removing all of the dodder it is absolutely necessary for him to 
follow directions closely, and care should be taken to secure the 
right kind of sieve. Those purchasing sieves or wire cloth for 
making sieves should see to it that they are actually 20x 20 mesh. 
This may be determined by placing a rule on the sieve and count- 
ing the number of spaces to the inch. Also, the size of the wire 
must be taken into account. The wire must not be éoarse. 
No. 34 on the Washburn & Moen gauge is the proper size for 
steel and iron wire. If brass or copper wire cloth is used the 
wire should be No. 32 (English gauge). The Station will fur- 
nish small samples of the wire cloth free upon request. 
The above directions for cleaning alfalfa seed do not apply 
to red clover seed. Owing to the smaller size of red clover 
seeds, dodder is not so easily separated from red clover as from 
alfalfa. For red clover, analysis is the chief safeguard. 
