_Drying with Tankage._--The practice now generally adopted is the mixing of the stick with tankage and drying in the standard fertilizer dryer, using a fifteen foot dryer with stationary shell and revolving shaft, with arms cylindrical type, usually known as the “Smith” dryer. The usual charge is 4,000 lbs. pressed tankage and 1,200 lbs. stick, agitating while the stick is being admitted so as to assist in equal mixing. The stick should be at a temperature of 190° F., or near thereto when used. The heated substance seems to produce less tailings, or small balls requiring milling. =Value of Tankage.=--To appreciate the value of the substances to be collected in this manner, we refer to copy of test, made by an expert, on a plant handling about 5,000 cattle and 5,000 hogs per week, as follows: ESTIMATE OF THE PRODUCTION AND VALUE OF TANKAGE MADE BY EVAPORATING TANK WATER. TEST FOR AMOUNT OF WATER DRAINED OFF VATS BEFORE PULLING TANKAGE. =======+=======================================+=======+======= | | | Av. Tank | Product |Gallons|gallons -------+---------------------------------------+-------+------- No. 1 |Prime tallow (cutting room bones, etc.)| 1,445 | No. 1 |Prime tallow (cutting room bones, etc.)| 1,734 | 1,589 | +-------+ No. 2 |Prime tallow (bed fat, etc.) | 1,645 | No. 2 |Prime tallow (bed fat, etc.) | 1,365 | No. 3 |Prime tallow (bed fat, etc.) | 1,426 | No. 3 |Prime tallow (bed fat, etc.) | 1,827 | 1,566 | +-------+ No. 4 |No. 2 tallow (catch basin stuff) | 668 | No. 6 |Pluck tank | 905 | No. 9 |Pluck tank | 562 | No. 10 |Pluck tank | 624 | No. 10 |Pluck tank | 847 | 735 | +-------+ No. 11 |Prime steam lard | 1,382 | No. 11 |Prime steam lard | 1,248 | 1,315 | +-------+ -------+---------------------------------------+-------+------- TOTAL NUMBER OF TIMES TANKS FILLED AND COOKED. No. Product. Tanks Prime tallow with cutting room bones 6 Prime tallow with bed fat, etc. 10 No. 2 tallow 6 Pluck tanks 13 Prime steam lard 6 -- Total 41 BASIS FOR ESTIMATE OF PRODUCTION.