| Green weight to tanks | 880 lbs. | |
| Yield No. 1 tallow | 397 lbs. | 45.11% |
| Yield dry tankage | 49 lbs. | 5.56% |
TEST ON SHEEP FEET TO TANK.
| Green weight to tank | 1,170 lbs. | |
| Yield No. 2 tallow | 40 lbs. | 3.42% |
| Yield dry tankage | 148 lbs. | 12.65% |
Operating Odorless.
—The question is frequently asked if rendering departments can be operated odorless. They can be operated so as not to become a nuisance. To do this requires:
(1) Ample tanks with no neglect about promptly rendering all products and reducing them to lard, tallow or dry fertilizer.
(2) Collecting and evaporating all tank waters.
(3) Drying of tankage done under vacuum or otherwise controlling odors.
(4) Catch basins under cover, skimmed frequently and contents cooked promptly.
(5) The rendering department kept tightly closed and department operated with forced draft, all discharged air passed through large water-wash, and the introduction into the air of gas boiled from tar oil.