PREFACE. IX 



enlarge the bounds of his understanding. 

 That they might be as much as possibly sub- 

 servient to the former, without raising an 

 impediment in the way of the latter, reflec- 

 tions, attendant on the several subjects, are 

 the more frequently introduced. 



To some persons it may perhaps appear 

 necessary, that I should have given an ex- 

 planation of all the technical terms which 

 are found in the following pages : for in- 

 stance, such as centre, or center, diaphanous, 

 equinox, focus, glands, lacteal, peristaltic, 

 &c. Here I would observe, that I have not 

 neglected such explanation where it could 

 be given without leading me too circuitous 

 a course ; and even where it is otherwise, 

 the omission will not afford an objection of 

 great weight ; for there is scarcely a dic- 

 tionary in which the requisite information 

 may not be met with. Perhaps in schools 

 this raay be productive of some advantage, 

 as it may lead to inquiry ; but that this 

 may have the better effect, it may be re- 

 marked, that the preceptor does not pro- 

 perly acquit himself in his duty towards 



his 



