The Book of Household Management by Mrs. Beeton

blundering calf--whose instinct only teaches him to suck, and that he will do at anything and with anything--acquire the knowledge of imbibition, that for the first few days it is often necessary to fill a bottle with milk, and, opening his mouth, pour the contents down his throat. The manner, however, by which he is finally educated into the mystery of suction, is by putting his allowance of milk into a large wooden bowl; the nurse then puts her hand into the milk, and, by bending her fingers upwards, makes a rude teat for the calf to grasp in his lips, when the vacuum caused by his suction of the fingers, causes the milk to rise along them into his mouth. In this manner one by one the whole family are to be fed three times a day; care being taken, that new-born calves are not, at first, fed on milk from a cow who has some days calved.