HOCKINGS' GARDEN MANUAL. 177 



times produce an injurious variation in the tempera- 

 ture. The interior is to be divided into three parts, of 

 which the central one, twenty-one yards in length, is 

 to contain the shelves \ the side compartments, about 

 five yards each, must be reserved — the southern as a 

 depot for the leaves, the northern as the hatching room. 

 Internal communication must be provided between the 

 three compartments, each of the smaller rooms having 

 two doors — one leading into the large room, the other 

 into the open air. 



" The arrangement of the hatching room is of the 

 greatest importance, and it will be necessary to sur- 

 round it with a double lining of stout planks, and erect 

 two stoves in the corners of one end. This end of the 

 room must be appropriated to the hatching of the 

 worms, having little stands prepared to place the worms 

 on after they are hatched, so as to regulate at pleasure 

 their distance from the fires. 



" The large room should be furnished with wooden 

 uprights, supporting sets of five shelves, four yards 

 by one and a-half, placed one above another, and dis- 

 posed in four rows, so as to leave a passage of one 

 yard in width between them, to facilitate the operations 

 of the attendants, and ensure free ventilation through- 

 out. Shelves, consisting of wooden frames filled with 

 a network of iron wire, and covered with wrapping 

 paper, are, according to the opinions of the best culti- 

 vators, the most economical, as well as the best and 

 most healthy. The third room, or depot for leaves, 

 must be so arranged as to preserve an atmosphere 

 constantly fresh, without being damp. A few tables 

 for preparing and cleaning the leaves will be all that is 

 required in the way of furniture. The cost of the 

 entire building as described may be about £150." 



Hatching. 



" The hatching chamber being heated to about 77° 

 Fahrenheit, the eggs are placed on fiat sheets of card- 



