...by the US Government. A tank can be made of pine boards, zinc or concrete. Make it 20 feet long, 2 feet wide at the top and 1 foot wide at the bottom and 5 feet deep. A shorter tank maybe used. One end should drop down perpendicularly, the depth should...

...with the head ducked for only an instant. For the average flock a vat, 20 feet long, 5 feet deep, 2 feet wide at the top, and 1 foot wide at the bottom is suitable. It should be perpendicular at one end, while the other end should have cleated incline...

...in clay soil and which carries a large amount of flood water as an example, might be 5 feet deep, 6 feet wide at the top, and 1 foot wide at the bottom. In general the smaller the ditch consistent with local conditions, the more efficient it will be from...