( 112 ) 
as to the Caiife of this Contraftion in thefe F/^r/7/^^,he thinks, 
that,befides the Animcil Sprits^ there are alfo required to this 
motion fome of the falino-fulphiireous parts of the Blood 3 and 
that thofe AmmalSpix'ns^thdLt contribute to the animal motion, 
confift of thofe Nirro-aerialparts,which he alTerts to be tranf- 
mitted into the blood by Infpiration. And both thefe parts he 
judges neceflary to this Mufcular motion , becaufe he under- 
flands not, how that Animarl motion can be perform'd without 
different particles mixed' together and briskly moved ; in re- 
gard thit jn his ofimon^ it cannot be effefled by Springinefs and 
Weight, which do the work \u Automat ums ^ fince their 
impetus will foon ceafe ; Whence he c6ncludes,that the Mufcu- 
lar contraftion is perform'd by the EfFcrvefcence of the Sali- 
no fulphureousand Nitro-aerial particIes;of which two he en- 
deavours to fliew the later toconftitute the veryAnimal Spirits, 
proceeding from the Brain in fuch Anima's as commonly are 
called ferfe£t^ and (according to Malpighius) from the Medulla 
fpimlis in ln[e6ts. But, though our Author afcribes fo much to 
che Nitro-aend particles as to make them the fame with the jim- 
md Spirit s\ yet would he not have us think,that he believes the 
Senfitive Soul to confift in a Congeries of Animal Spirits^fince he 
conceives that Sou! to be a thing different from them , and to 
confift of a matter yet more fubtile and aethereaI;of which thofe 
nitro-aerial particles,that is,the AnimalSpirits, aretheinftru- 
uientof operation. And concerning that Senfitive Soul he thus 
declares his mind,-!//;^. That it is a more divine aura, endowed 
with fenfe from its firft creation, and coextended to the whole 
world; a fmall portion of which being contained in a duely dif- 
pofed fubjed exferts fuch funaions,as we fee and admire in the 
bodies of Animals. 
Having difpatch^'t this Hypothecs about the nature of Animal 
Spirits,he endeavours to explain from thence the manner of all 
Fermentations and Concodlions performed in iht vifcer a of 
nimals,and particularly in the Stomach^Pamreas^ and Spleen ; 
in the lafl of which he takes occafion to fliew^ l?oth how 
the Fixed Salts in Animals are volatilized , /i;^^ that from 
PIants,(which he faith are furnilh'C with no Volatil Salt)if 
they belaid to putrify, a confiderable quantity of Volatil 
Salt 
