Open sashes for hothouses

2083. Arrangements for opening the sashes of hothouses are of the utmost importance, as the health of the plants depends in a great measure on the facilities possessed by the gardener for admitting and changing the air of the house; but as there are various modes of opening the sashes of hothouses, the details will be given under the head of ventilating hothouses. (See Subsect. 10. p. 618.)