PREFACE, XV11 



mals in common life, yet even these would 

 greatly exceed the bounds to which we 

 have thought it right to limit ourselves. 

 The knowlege of Dicetetics is a necessary 

 branch of medicine, as by a proper atten- 

 tion to that article, an obstinate distemper 

 may be eradicated, when common reme- 

 dies have failed; but this can never be 

 attained, without the study of Zoology, 

 which assists us greatly in learning the 

 different qualities of animal food; and 

 how far a difference of nutriment may con- 

 tribute to cure the disease. 



Cloathing is essential, not only to our 

 comfort, but subsistence ; and the number 

 of our manufactures, relative to this single 

 article, demand our care for their extension 

 and improvement ; especially as the main- 

 tenance of thousands depends on these 

 important branches of commerce; yet 

 these may be enlarged, by discovering 

 new properties in animals, or by the far- 

 ther cultivation of those already disco- 

 vered. The science of Zoology is requi- 

 site for each of these; and if we reflect 



vol. I. b 



