24 BULLETIN 723, XT. S. DEPARTMENT OF AGBICULTTTRE. 
of kerosene. In this work 1,624 acres of land in the vicinity of 
Hearne were cleaned, and 7.170 acres in 'southeastern Texas. The 
work was not confined to fields in which infestation was actually 
found, but included fields at a considerable distance beyond the 
outermost points found infested. It involved the employment of an 
average of about 500 laborers for the months of November. Decem- 
ber. January, and February, and a portion of March. In many 
cases the laborers were assembled in camps and housed and pro- 
visioned by the department. In other cases, where the work was in 
the vicinity of towns, it was possible to employ local labor. The 
safeguarding of cotton products produced in the infested areas in 
1917 consisted of the milling of the seed under supervision at cer- 
tain mills selected because their construction would enable the work 
to be done with practically no danger of disseminating the pest. 
The baled cotton, so far as possible, was caused to be exported or 
shipped directly to northern mills. 
COTTON-FREE ZOXES. 
In 1917 the Legislature of Texas passed an act intended to give 
authority to prevent the establishment of the pink boilworm in the 
State. Under this act authority was granted to quarantine the dis- 
tricts in which the insect might be found, and to establish zones in 
which the planting of cotton might be prohibited. Under this 
authority on January 21. 1918. the governor of Texas quarantined 
the Hearne district as well as the territory found infested in south- 
eastern Texas. In the case of Hearne the quarantined area included 
a territory within a radius of 3 miles from the mill. In the case of 
southeastern Texas the quarantined area included a safety zone on 
the outermost points infested approximately 10 miles in width. 
On February 25, 1918. following the recommendation of Hon. Fred 
TT. Davis, commissioner of agriculture, the governor of Texas issued 
a proclamation prohibiting the planting of cotton in the quarantined 
areas. 
The finding of infestation by the pink boilworm in Mexico not 
far from Del Eio in the spring of 191S made it necessary to place 
in operation another section of the Texas pink boilworm act. As a 
consequence a third noncotton zone was provided to include McKin- 
ney. Maverick, and Valverde Counties. 
SPECIAL REGULATION AT MEXICAN BORDER. 
The risk of direct entry of the pink boilworm from Mexico by 
flight or by accidental carriage necessitated the provision in the 
regulations governing the entry from Mexico of cottonseed cake, 
meal, or other cottonseed products, including oil. that permits for 
such entry should be issued only for the products named produced in 
