74 DIIIECT BENEFITS FKOM iMOTHS. 



formed by glands in the human body. I am there- 

 fore persuaded, that the gum bags of the Silkworm 

 are furnished with a set of minute glands, which, 

 being impregnated with gum, afford a free passage 

 to all the juices of the mulberry leaf coiTesponding 

 with the glutinous matter, while they exclude every 

 fluid of a different quality." * If this theory l)e 

 con-ect, then it applies equally to all the silk- 

 spinning caterpillars. 



• Spectacle de la Nature, vol. i. 



