24 BULLETIN 1184, U. S. DEPARTMENT OF AGRICULTURE. 
uniform, not only as to the grade but also as to the length, strength, and type. 
A system of field inspection should be inaugurated and a number of inspectors 
employed, whose duty it shall be to locate and mark off in the field spots 
where, for one reason or another, the cotton is likely to be of different char- 
acter from that of the rest of the field, in order that the cotton from such 
spots may be picked, ginned, and baled separately. This inspection should 
follow the cotton through the gins in order to make sure that no mixing of 
the separately picked cotton takes place in ginning and to guard against the 
mixing of badly ginned cotton in the same bale with that which has been 
properly ginned. All bales of cotton which have been picked and ginned 
under conditions approved by the inspector should be entitled to a certificate 
stating that to the best of his knowledge and belief the contents of said bale 
are of uniform character. 
COMPRESSING PIMA COTTON. 
We recognize the importance of making provisions whereby it may be pos- 
sible for Pima cotton to reach the manufacturer in the best possible condition. 
To this end we favor the erection of a central compress here in the Salt River 
Valley which may be under the supervision of the associated growers and which 
may turn out a distinctive type of bale. We believe that such a compress would 
result in a material saving to the industry through better transportation and 
storage rates and that the commercial value of our product would be relatively 
higher than it now is under existing methods of compression in transit. 
PROMOTING USE OF PIMA COTTON. 
We recognize that the law of supply and demand is supreme and inexorable, 
and that it governs the price of Pima cotton as well as of other commodities. 
We believe that stocks of Pima on hand are not excessive in view of the world's 
requirements for such cotton. We think, however, that the demand for Pima is 
far below its merits and we recommend that concerted effort be made to en- 
courage the increased use of this superior commodity. 
In accordance with these resolutions plans for certain improved 
methods in production, ginning, and handling the cotton were 
formulated and carried on in connection with the 1922-23 crop. Ex- 
periments in relation to field segregation and gin improvements are 
being conducted, the results of which will be published when tests are 
complete. 
CONCLUSIONS. 
Pima cotton has been manufactured successfully into tire yarns, 
tire fabrics, balloon cloth, and airplane fabrics, where strength and 
elasticity are the chief requisites. 
Pima cotton is being manufactured satisfactorily into fine yarns, 
fine shirtings, dimities, lawns, and voiles. Yarns made of Pima cot- 
ton when mercerized are as lustrous as Sakellaridis or Sea Island 
yarns. 
Pima cotton grown under suitable conditions and properly ginned 
and well handled is equal to either Sea Island or Sakellaridis cotton 
for the manufacture of fine yarns and sheer goods. 
Many of the criticisms offered by manufacturers can be entirely 
avoided by proper production methods. 
Field inspection and field segregation will avoid the mixing of the 
inferior cotton from high spots, root-rot, and alkali spots with the 
cotton that is grown under favorable conditions. Such a system 
properly carried out will reduce the variations in staple, the high 
percentage of waste, and the number of mixed packed bales now en- 
countered by the manufacturers. 
