[428] 
felf has formerly been troubled) Hedifcourfes alfo of the 
Hemoptoe, Difficilis l^efpiratio, and the Angina ; in all 
which he obferves the method of the former tradl, and 
is very copious in explaining Symptoms; but contents 
hinifelf ( chiefly ) with Theory, as well in this, as in 
the two preceding difcourfes. 
j4n account of a Book^ Entitled [ Memoirs for the Natural 
Htfiory of Human Bloody ejpecially the Spirit of that 
Liquor'- by the Honorable Robert Boyle El^'i Fellow of 
the ^oyal Society London, i d8 3 . ] 
THe honourable Author well known to the World, 
by his noble Birth, and Learned Writings, hav- 
ing formerly obliged us with feveral experimen- 
tal Hiftories, befide many other elaborate difcourfesj 
Is now pleafed to ingage us farther to him, by giving 
us rules, how to frame, and by bringing in a great ftock 
of materials for, a Natural Hiftory oi Human Blood, and 
the fpirit of it, in doing which, he obferves this method; 
the Book being divided into four parts, in the firft of thefe 
he lays down fome Rules, concerning the way of compi- 
ling the natural Hiftory of any particular Subjed:^ where 
he propofes, that whatever occurs, concerning the Subjed: 
to be treated off may be rankt under feveral Orders, ox 
Claffes, agreeing in the general names ofTitles: the firft or 
Primary, order, the Author would have to confift offuch 
Titles, 2is fhall comprehend the whole matter of the Subjed:, 
as it appears at firft view : but when the matter of any Pri- 
mary Title encreafes on your hands, it will be proper that 
That alfo fhould be divided, according to its own nature, 
into feveral fubordinate Branches, or Secondary Titles 
And 
