_Liquid Manure._--This term is applied to the urine of the animals fed on the farm, and to the drainings from the manure-heap, which, in place of being returned to it, are allowed to flow away, and collected in tanks, from which they are distributed by a watering-cart, or according to the method recently introduced in Ayrshire, and since adopted in other places, by pipes laid under-ground in the fields, and through which the manure is either pumped by steam-power, or, where the necessary inclination can be obtained, is distributed by gravitation. That liquid manure must necessarily be valuable, is an inference which maybe at once drawn from the analyses of the urine of different animals already given, and of which it chiefly consists. In addition to the urine, however, it contains also the soluble organic and mineral matters of the dung, as well as a quantity of solid matters in suspension, among which phosphates are found, and thus it possesses a supply of an element which would be almost entirely deficient if it were composed of urine alone. In the following analyses by Professor Johnston, No. 1 is the drainings of the manure-heap when exposed to rain; and No. 2 the same, when moistened with cows' urine pumped over it, the results being expressed in grains per gallon:-- No. 1. No. 2. Ammonia 9.6 21.5 Organic matter 200.8 77.6 Ash 268.8 518.4 ----- ----- Total solids in a gallon 479.2 617.5 The ash contained-- Alkaline salts 207.8 420.4 Phosphates 25.1 44.5 Carbonate of lime 18.2 31.1 Carbonate of magnesia, and loss 4.3 3.4 Silica and alumina 13.4 19.0 ----- ----- 268.8 518.4 More elaborate analyses of the same fluid have since been made by Dr. Voelcker, with the subjoined results per gallon:--