Art. II. 2. 5. 1. INCITANTIA. 29 



I afcribed to the inirritability of the difeafed lungs. For other 

 cafes the reader is referred to the publications of Dr. Beddoes ; 

 Confiderations on the Ufe of Factitious Airs, fold by Johnfon, 

 London. 



Its effects would probably have been greater in refpect to the 

 quantity breathed, if it had been given in a dilute ftate, mixed 

 with 1 o or 20 times its quantity of atmofpheric air, as otherwife 

 much of it returns by expiration without being deprived of its 

 quality, as may be feen by the perfon breathing on the flame of a 

 candle, which it enlarges. See the Treatife of Dr. Beddoes 

 above mentioned. 



Mr. Scott in his letters in the Bombay Courier gave the black 

 calciform ore of manganefe in the quantity, he fays, of feveral 

 drachms a day without any inconvenience to a venereal patient, 

 hoping to ferve him by the oxygen contained in that calx. I 

 have formerly given lapis calaminaris to the quantity of 20 

 grains twice a day in confumption, without inconvenience, and I 

 fuppofe this calciform ore of zinc, as well as the ruft of iron, 

 may be an union of thofe metals with oxygen, and may probably 

 be given internally with more fafety than calces of lead, which 

 were once famous in confumptions. See Clafs II. 1. 5. 2. and 

 Article IV. 2. 7. 1. 



V. Thofe paflions, which are attended with pleafurable fenfa* 

 tion, excite the fyftem into increafed action in confequence of that 

 fenfation, as joy, and love, as is feen by the flufh of the fkin. 

 Thofe paffions, which are attended with difagreeable fenfation, 

 produce torpor in general by the expenfe of fenforial power oc- 

 cafioned by inactive pain ; unlefs volition be excited in confe- 

 quence of the painful fenfation ; and in that cafe an increafed 

 activity of the fyftem occurs j thus palenefs and coldnefs are the 

 confequence of fear,but warmth and rednefs are the confequence 

 of anger. > 



VI. Befides the exertions of the fyftem occafioned by increaf- 

 ed ftimuli, and confequent irritation, and by the paffions of the 

 mind above defcribed, the increafed actions occafioned by exer- 

 cife belong to this article. Thefe may be divided into the ac- 

 tions of the body in confequence of volition, which is generally 

 termed labour ; or fecondly, in confequence of agreeable fenfa- 

 tion, which is termed play or fport ; thirdly, the exercife occa- 

 fioned by agitation, as in a carriage or on horfeback •, fourthly, 

 that of friction, as with a brufh or hand, fo much ufed in the 

 ©aths of Turkey ; and laftly, the exercife of fwinging. 



The firft of thefe modes of exercife is frequently carried to 

 great excefs even amongft our own labourers, and more fo un- 

 der the lafh of flavery ; fo that the body becomes emaciated and 



finks 



