78 



FARMERS' REGISTER 



(luce this branch of agricullure into the northern 

 anil cenlriil departmenis. These trials weie con- 

 tinued iljfough a long succession of years, but ge- 

 nerally proved unsuccesslLil. Recently, however, 

 Caniiile Beauvais, either liom possessing more 

 perseverance than his predecessors, or being more 

 capable ol' Ibrming a just appreciation of the mflu- 

 ences ofclimate, has succeeded in establishing the 

 culture of the mulberry and the rearing ol' silk- 

 worms in the vicinity of Paris. The important 

 improvements introduced {-.y him have povyerlully 

 contributed to the success oi' this branch of indus- 

 try, and are therelbre well worth the attention of 

 those interested in the silk culture. 



To remedy the delticts of climate upon silk- 

 worms, protect them liom the ordinary sudden 

 vicissitudes of weather, and place them under at- 

 mospheric conditions most favorable to their health 

 and developement, were the first objects of his 

 researches. In pursuit of these ends he applied 

 to Claude Dumoni, who furnished him with the 

 means ol' regulating the entrance and esi-.ape of 

 air into the cocoonery. Peclat soon afterwards 

 su'Tgested modifications which were of great ad- 

 vantage, and, finally, he had the happiness to find 

 a new'^assistant in D'Arcet, who, applying science 

 to observation, succeeded in maturing a complete 

 plan of a salubrious cocoonery, by means of which 

 the proper degrees of ventilation, temperature and 

 moisture, necessary to insure successful rearing 

 can always be obtained. 



The magnanery, or cocoonery, described by 

 D'Arcet, in which this ingenious system is carried 

 into eHect, is at Villemonble near Paris, and was 

 erected by the government architect, Destailleurs, 

 for De Grimaudet. It has two wings, both uni- 

 form, and each about 150 liset long by 50 wide. 

 The lower or basement story is appropriated as u 



filature or reeling apartment, and place lor drying 

 leaves. It has pillars along the centre lor the sup- 

 port of the floor above ; at one end of tiiis apart- 

 ment, and through its whole width, a portion is 

 cut oli(see fig. 3) serving as a chamber lor warm 

 or cool air, and from this the ventilation of the 

 whole cocoonery is tll'ected. The air chamber is 

 supplied with a furnace (4) the flue of which ter- 

 minates in the main chimney (21.) 



It is in this portion of the basement that the 

 heating and cooling, together with the general 

 means of ventilation are elfected. The remainder 

 of the story (M) is appropriated to the drying of 

 leaves when these have been gathered in a moist 

 state, and for reeling cocoons according to the me- 

 thod of Gensoul, after the completion of the feeding. 



The apartment (O) immediately above the 

 basement is devoted exclusively to the rearing of 

 worms. It has four flues, or conductors, made of 

 wood running under the floor lengthwise, (the 

 commencement of which are seen at plates 1, 2, 

 fig. 14.) Through these the air, after being pro- 

 perly warmed or cooled, in the air chamber, (3) is 

 conducted into the cocoonery. Above these flues 

 are placed the hurdles (8.) The apertures (15) 

 through which the air passes into the cocoonery 

 are of unequal size, each flue has sixty, of which 

 the first that receives the air is only about an inch 

 sq'jare, the size of the others increasing in arith- 

 metical proportion as they recede from the air- 

 chamber. The sum of the superficies of the sixty 

 holes, amounts to 0,198 of a square metre, (the 

 square metre being equal to 1,196 square yards.) 



The vitiated air of the cocoonery is drawn off 

 by means of lour flues (plate 2, figs. 20) placed 

 above, with apertures (19) opening into them. In 

 Ibrm and arrangement these flues and apertures 

 correspond with those below lor introducing the air. 



PLATE I.-END VIEW. 



