386 GRAPE CULTURE AND WINE-MAKING. 



Since the manner of warming a house by means of hot air has 

 been known, it has also been deemed advisable to introduce it into 

 these establishments. The heated air escapes from the stoves, and 

 is conducted by pipes to the breeding-rooms. Those pipes have 

 round holes five or six inches distant to allow the air to stream 

 forth. 



