A method of determining grease and dirt in wool . n a blower-dryerto speed up this operation. (See A, Fig. 4, also C, D, and E, Fig. 5.)Drying for one hour in the blower-dryer and standing in the open atroom temperature for 15 minutes brings the samples to an air-dry 2 « constant-moisture content/ as used here, allows for a slight variation but is insufficient to affectthe results appreciably. BULLETIN 1100, U. S. DEPARTMENT OF AGRICULTURE, condition. The samples are again dried, at 50° C. for three hours,and weighed. The samples are next washed with soap and water at a tempera-ture of from 40
A method of determining grease and dirt in wool . n a blower-dryerto speed up this operation. (See A, Fig. 4, also C, D, and E, Fig. 5.)Drying for one hour in the blower-dryer and standing in the open atroom temperature for 15 minutes brings the samples to an air-dry 2 « constant-moisture content/ as used here, allows for a slight variation but is insufficient to affectthe results appreciably. BULLETIN 1100, U. S. DEPARTMENT OF AGRICULTURE, condition. The samples are again dried, at 50° C. for three hours,and weighed. The samples are next washed with soap and water at a tempera-ture of from 40° to 45° C. for three-quarters of an hour. (See ) About one-half pound of neutral soap is placed in the first vatcontaining 150 gallons of water. After washing the samples, thewater is squeezed from them and they are placed in a second vatand washed for half an hour in clear water at a temperature of from40° to 45° C. When washing extremely dirty wool, one-quarter ofa {found of neutral soap is added to the 150 gallons of water in the. Fig. 3.—Grease extraction apparatus. Extraction containers are shown in the right half of this illus-tration, with filter papers beneath. The baskets of wool are placed in these containers and gasoline ispoured into the containers until within 2 inches of the top Lids are placed on the containers after theagitating process, and the gasoline is allowed to stand 45 irinutes. Upon filtering, the gasoline returnsto the pressure tank, A. It is then forced into the distillation tank, B, condensed in tank, C, and re-turned through the collecting tank, D, and the upper pipes into can, E. At F is shown the card filebearing the weekly schedule of work. A card is used for each days program. This schedule is shov nin full on page 17. second vat and the wool is again washed for 30 minutes, but soapis not used in the second vat unless the wool is extremely case soap has been used in the second vat the water is squeezedfrom the wool and it
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherwashi, bookyear1922
