88 Solid Particles in the Blood. [Book IX, 



which, as is allowed by all who ufe them, do not dif- 

 figure objects, but only reprefent them larger/ 



It is unneceflary to follow Mr. Hewfon into his 

 fpeculations with regard to the ufe of the thymus and 

 lymphatic glands, which he thinks are defigned to fa- 

 bricate the middle folid particles of the blood which 

 are afterwards to be % furnifhed with veficles in the cells 

 of 'the fpleen. Thefe inquiries may fhew the inge- 

 nuity of their author, but will not anfwer our purpofe, 

 which is to detail with concifenefs what has been afcep- 

 tained with certainty. 



