FARMERS' REGISTER. 



7D 



PLATE II.— SIDE VIEW. 



The upper flues are made to unite into one box, 

 previous to entering liie main chimney (21,) tiiis 

 box is furnished with a ventilating wheel, (tarare) 

 (22) and its size, as well as that of its opening 

 into the chimney (23,) is five times greater than 

 that of either of the flues. 



The air from the cocoonery may be conducted 

 at pleasure either immediately into the main chim- 

 ney (21) or by way of the ventilating wheel into 

 the garret. By closing the register (23) and thus 

 cutting otf the direct communication with the 

 chimney, the ventilating wheel is made to draw the 

 air frona the cocoonery and force it outside through 



aperiures in the garret with greater or less rapidity. 



The size of the main ventilating chimney (21) 

 should be equal to double the capacity of the lour 

 flue?. Ventilating flues may, if nece.=sary, be con- 

 structed upon economical principles, the cracks in 

 the wood being closed by means of coarse paper 

 or cloth coated with glue, fn constructing a new 

 cocoonery, the flues may be advantageously es- 

 tablished in the space between the floor and ceiling. 



At the bottom of the main chimney there is a 

 furnace (fournmu (Tappel) (25) specially appro- 

 priated to the purjiose of creating and increas- 

 ing the draught. The pi['e (5) from this is 



