6 BULLETIN 38, U. S. DEPARTMENT OF AGRICULTURE. 
fore see to it that either certain gins are set aside solely for ginning 
the cotton from the rogued fields or else that the gins are thoroughly 
cleaned before this special seed cotton is run through. All sacks, 
bins, wagons, etc., used in handling and storing the select seed, both 
before and after ginning, should be carefully inspected in order to 
make sure that no other seed or seed cotton is present. Finally, the 
greatest care should be taken to mark the sacks or bins containing the 
selected seed, so that mixing can not take place. The packages in 
which this seed is sent out to growers should be so marked that there 
can be no uncertainty about the seed which they contain. 
WHAT THE DEPARTMENT OF AGRICULTURE CAN DO. 
The Department of Agriculture can cooperate with the associa- 
tions of growers by instructing the persons who may be selected to 
supervise the roguing in regard to the type which is to be preserved. 
The department recognizes that in the present state of the industry 
the growers can not be expected to possess such knowledge, but it is 
expected that many of them will endeavor to familiarize themselves 
with the points involved, so that the associations will soon be able to 
carry the work along on their own initiative. 
At the cooperative experimental garden at Sacaton plant-breeding 
work will be continued, with a view to developing still better varie- 
ties of Egyptian cotton. 
Other sorts of cotton which may be suggested as likely to be more 
profitable will be tested in comparison with the variety now grown, 
under such conditions as to preclude any danger of contaminating seed 
which is intended for distribution to farmers. If this work should 
result in demonstrating that it will be advantageous for the growers 
to replace the present stock with some other, steps will be taken 
to supply them, through the associations, with sufficient seed to 
enable the entire community to make the change at one time. In 
short, no effort will be spared to aid the Salt River Valley in gaining 
a reputation for the excellence of its long-staple cotton. 
SUMMARY. 
Egyptian cotton is a special type, related to Sea Island, but very 
distinct. The fiber is especially used in the manufacture of fine 
cloths and of goods in which strength and durability are essential, 
such as sewing thread, hosiery, automobile-tire fabrics, etc. 
Numerous varieties have been successively developed in Egypt. 
Each of these has apparently originated as a mutation, or " sport," 
quite different from the parent stock and producing a very uni- 
form progeny. The varieties rapidly deteriorate in Egypt, however, 
as a result of crossing with one another and with the Hindi, or 
weed cotton, which is present in all parts of the country. 
