122 LYMPHATIC SYSTEM. 



future publication ;* but in order to prepare the reader for it, 

 I have thought it necessary to lay before him a description and 

 comparison of the lymphatic vessels in different animals. And 

 that this may be the more worthy his attention, I have not 

 only traced those vessels in most parts of the human body as 

 Dr. Meckel has done, but I have observed some circumstances 

 which had escaped his notice ;" and I have illustrated the 

 description with plates, the necessity of which has appeared so 

 strongly to some who have preceded me in this subject, par- 

 ticularly to Messrs. Monro, Meckel, and Hunter, that they have 

 each promised to supply the deficiency, but none of them 

 having yet done it, I have undertaken the task myself, that I 

 may be able to refer the reader to the facts from which my 

 conclusions are made. 



1 An abstract of these discoveries, though an imperfect one, has heen published in 

 the Medical Commentaries of Edinburgh, No. 1, but without my concurrence (LXII). 



(LXII.) See ' Medical and Philosophical Commentaries, by a Society 

 in Edinburgh/ vol. i, p. 99, 8vo, Lond. 1773 ; and the Letter to Dr. 

 Haygarth, republished in the present edition of Mr. Hewson's works. 

 His views concerning the glands without regular ducts are given at 

 length, by Mr. Falconar, in the Third Part of the Experimental 

 Inquiries. 



