22 PHYSIOLOGY. 



merely from the state of the soul, as more or less intelligent 

 or attentive, all which you will very readily understand. 

 I have to mention one other opinion which is of a mixed kind, 

 it is that of Dr. Gaubius. How far he is different from Boer- 

 haave, I do not say ; but he seems to be different : he allows, 

 with Boerhaave, that hardly any motions occur in the mind that 

 have not a corresponding motion in the corporeal parts, so in 

 523. of his Institutiones Pathologice, he says 'Mens nimirum 

 corpori suo, dum vita viget, intime implicata est : ut difficulter 

 concipere liceat tarn exquisite puram ejus dperationem quse 

 prorsus nihil corporeoe mutationis quoquo modo sibi innexum 

 habeat,' &c. That is going near to assert the notion of Boer- 

 haave. But in the following paragraph, towards the end, Dr. 

 Gaubius, as apprehending in some measure, or fearing without 

 ground, I think the consequences of tHe Boerhaavian opinion, 

 or, if you will, by way of explaining it, gives these words : 

 ' Agnoscendum tamen videtur, aliquod menti in earn con- 

 cessum esse imperium, quo excitare silentem pro lubitu possit 

 ad agendum tarn in universe corpore, quam in singular! parte : 

 perinde ut musculi etiam arbitrio parent.' He says, that for 

 the most part, indeed, we find a strict connexion between the 

 state of the mind and body ; but he thought that the * indivi- 

 due comitatur* was too strong, therefore he thought the mind 

 might excite motions, or cease from its usual actions very 

 much of itself. Now these are different opinions with respect 

 to the share which the soul has in the action of the economy. 

 I shall hereafter give my reasons for rejecting some of these 

 and admitting others ; but several matters must be explained 

 before we consider them fully. It may, however, be necessary 

 at present to say, that I am equally remote from the materialists 

 on the one hand, and the Stahlians on the other; and, if I were 

 to choose, I would take the opinion of Dr. Gaubius; but even that 

 is not necessary to our system of physic; nay, I think it will dis- 

 turb it, and confound it upon several occasions. I think it was 

 not necessary to make such an addition, for even Dr. Stahl 

 truly acknowledges that his views are not necessary to the 

 system of physic ; so in the preface which Dr. Stahl has put 

 to Juncker's Conspectus Medicina?, after he has endeavoured to 

 prove and ascertain * Quod vera causa efficiens (directionum 



