CHAPTER XV.

TANK WATER 189

Soil Fertility -- Animal Feeding -- Tank Water -- Separation of Solids -- Collecting Grease -- Testing Tank Water -- Evaporating Tank Water -- Description of Apparatus -- Cleaning Evaporators -- Table of Boiling Points -- Testing Stick -- Copperas in Water to Evaporate -- Solids in Water -- Drying Stick -- Value of Tankage -- Quantity of Tank Water -- Cost of Evaporating.