. Dairy farming : being the theory, practice, and methods of dairying. Dairy farms; Dairy plants; Milk plants. 298 DAIRY t'uOLEY's ChEjUIER. In Fig. IPiO we give a section of one of Coolcy's inilk-setting cans as it is in the box, with the water flf)wing over it, and the cream gathering on the top of the milk. It will be noticed that the can is comi)letely sub- -P merged, tlie water flowing over the top of it. The covers are held iu position, as will be seen in the cut, by bars of wood. ])laced across them. They are neither air- tight nor water-tight, }et the water does not get into
. Dairy farming : being the theory, practice, and methods of dairying. Dairy farms; Dairy plants; Milk plants. 298 DAIRY t'uOLEY's ChEjUIER. In Fig. IPiO we give a section of one of Coolcy's inilk-setting cans as it is in the box, with the water flf)wing over it, and the cream gathering on the top of the milk. It will be noticed that the can is comi)letely sub- -P merged, tlie water flowing over the top of it. The covers are held iu position, as will be seen in the cut, by bars of wood. ])laced across them. They are neither air- tight nor water-tight, }et the water does not get into the cans, because the air un- der the rims of the covers, acting on the principle of a diving- bell, prevents it. If the milk were first of all aerated by forcing through it a volume of air which had been filtered through cotton-wool, or in some other effectual manner, we think this system of milk-setting would be as nearly as possible perfect; but if the milk, directly it is taken from the cow, is put into these cans, and hermetically sealed in the manner described, it would almost seem that the gases of the milk, being confined on the surface, can hardly fail, particularly in hot weather, to injure, however slightly, the quality of the cream. Aerating the milk before sub- merging it would remove all possible danger on this score. It is at the same time true that the rapid cooling of the milk fills the office of a safeguard against any dangi>r which may arise from the action f)f the gases and odours peculiar to milk fresh from the cow. That such sources of danger exist no one who knows his subject will, we think, deny ; and, especially in hot weather, when cows are gadding about the fields, is this danger the more apparent to one's sense of smell when his face is over a pail of newly-drawn milk. These remarks, it must be understood, Ix-ing applicable to milk from healthy cows, are more decidedly so to milk from cows who have fi)ot-aiid-mouth or any kindred disease. 15ut in
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