CONVICT LABOR FOR ROAD WORK. 133 
Khaki, 12.4-ounce. 
Material. — The yarn to be made of American cotton. The fabric woven in a work- 
manlike manner and free from imperfections. To be thoroughly brushed to remove 
motes or other foreign substances. 
Threads. — To contain not less than 46 threads of 3-ply yarn to the inch of warp, and 
not less than 32 threads of 4-ply yarn to the inch of filling. 
Strength. — To sustain a tensile strength of not less than 116 pounds to the one-half 
inch in the warp and not less than 90 pounds to the one-half inch of filling. 
Width. — To be full 29| inches wide when finished, with a blue thread of 3-ply yarn 
woven in the fabric 1 inch from each selvage. 
Weight. — To weigh not less than 12.4 ounces nor more than 13 ounces to the linear 
yard. 
Color. — To be a khaki shade as represented by the sealed standard sample and may 
be dyed in the raw stock, yarn, or piece. Bleaching, half bleaching, or scouring 
before dyeing is not permitted. To be evenly and regularly dyed and to be sub- 
jected to the following official tests for ascertaining permancy of color: 
1. Boiling for 10 minutes in a solution of soap (80 grains of olein soap, army issue, 
to 1 pint of water) . 
2. Boiling 10 minutes in a solution of soda (10 grains of bicarbonate of soda to 1 
pint of water) . . 
3. Whenever deemed necessary by the contracting officer the duck will be sub- 
jected to exposure to sunlight, air, and moisture for a period of 30 days. 
Khaki, 8-ounce. 
Material. — The yarn to be made of American cotton. The fabric woven in a work- 
manlike manner, free from imperfections. To be thoroughly brushed to remove 
motes or other foreign substances. 
Threads. — To contain not less than 54 threads of 2-ply yarn to the inch of warp, 
and not less than 34 threads of 2-ply yarn to the inch of filling. 
Strength. — To sustain a tensile strength of not less than 75 pounds to the one-half 
inch in the warp and not less than 50 pounds to the one-half inch in the filling. 
Width. — To be full 28^ inches wide when finished, with a blue thread of 3-ply yarn 
woven in the fabric 1 inch from each selvage. 
Weight. — To weigh not less than 8 ounces nor more than 8 \ ounces to the linear 
yard. 
Color. — To be a khaki shade as represented by the sealed standard sample and may 
be dyed in the raw stock, yarn, or piece. Bleaching, half bleaching, or scouring 
before dyeing is not permitted. To be evenly and regularly dyed and to be subjected 
to the following official tests for ascertaining permanency of color: 
1. Boiling for 10 minutes in a solution of soap (80 grains of olein soap, army issue, 
to 1 pint of water. 
2. Boiling 10 minutes in a solution of soda (10 grains of bicarbonate of soda to 1 
pint of water). 
3. Whenever deemed necessary by the contracting officer, the duck will be sub- 
jected to exposure to sunlight, air, and moisture for a period of 30 days. 
The life of tents depends so greatly upon climatic conditions that 
no general estimate can be made here. Experience indicates that 
the period of satisfactory service will vary from six months to three 
years. In humid regions and in sections of prevailing high winds 
little more than the lower limit of usefulness can be expected: but hi 
relatively dry climates and where high winds are infrequent the life 
