Elements of practical agriculture; comprehending Elements of practical agriculture; comprehending the cultivation of plants, the husbandry of the domestic animals, and the economy of the farm elementsofpracti00lowd Year: 1838 CEREAL GRASSES. Fig. 128. 22;} portant, and the thrashed corn remaining generally for a con- siderable time in a heap is subject to injury of various kinds. For these reasons, the invention of the thrashing-machine is to be regarded as important in the progress of improvement. The farmer by means of it is enabled to get his work perform- ed at once and with despatch,
Elements of practical agriculture; comprehending Elements of practical agriculture; comprehending the cultivation of plants, the husbandry of the domestic animals, and the economy of the farm elementsofpracti00lowd Year: 1838 CEREAL GRASSES. Fig. 128. 22;} portant, and the thrashed corn remaining generally for a con- siderable time in a heap is subject to injury of various kinds. For these reasons, the invention of the thrashing-machine is to be regarded as important in the progress of improvement. The farmer by means of it is enabled to get his work perform- ed at once and with despatch, and in a more perfect manner than is usually done by manual labour. It is in these things rather than in the saving of expense, that the superiority of the thrashing-machine over the flail consists. The thrashing-machine has always a winnowing-machine at- tached, and forming a part of it, by which the grain is partial- ly freed from the chaff and impurities. Sometimes two win- nowing-machines are attached to the larger class of thrashing- machines ; but this is rare, and where there is only one winnow- ing-machine, the corn, as it is received from the thrashing-ma- chine, undergoes a further process of winnowing in a separate machine, in order to be fully cleaned. The thrashing-machine performs three operations :—First, it beats the grain and chaff from the straw, by means of the beaters fixed upon its revolving cylinder ; second, by means of its revolving rakes it shakes the chaff and intermingled seeds from the straw, which last is separately thrown out of the ma- chine ; and third, by means of the attached winnowing-appa-
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