17^ on silk worfni, Oct. 3. 



that bj a stove. I fhould think therefore that a south 

 exposure, with a few glazed windows, and a conside- 

 rable number of windows closed with fhutters, that 

 could be opened during the day time, when the sun 

 ihone bright, and the weatiier was in other respects 

 favourable, would be the most eligible. 



Every person who has had the management of 

 silk, worms on a large scale, complains of the noxi- 

 .ous vapour that is generated hy them, unlefs they be 

 kept very dean, and the house properly ventilated. 

 Dr Anderson in Madras has found this kind of ven- 

 tilation so necefsary for the health of the animal, es- 

 pecially in damp weather, that he has contrived a 

 kind of cane matting for admitting the air freely ; 

 ^which has there answered to admiration. It is sur- 

 prising however that in Italy, and other warm cli- 

 mates in Europe, where the silk worm has been so 

 long reared, so few contrivances ftiould haye been a- 

 dopted for obviating this inconvenience ; for it seems 

 to be an undeniable fact, that the silk worm itself 

 dies in great numbers, in every case where this ar- 

 ticle of cleaniinefs is neglected. 



By some late experiments made by M. Faujas de 

 St Fond, and recorded in his history of Languedoc, 

 it appears that the silk worm is much hurt by this 

 foul air. From the experiments of Mr Ingenhouz we 

 also know that all decaying leaves produce mephitic 

 air in great abundance ; and as silk worms sire con- 

 stantly fed upon leaves in this state, it must necefsa- 

 rily abound very much in the places where they 

 are kept, if proper means are not taken to remove it. 

 As this mephitic vapour is more weighty than com- 



