1046 JURINE, NYSTEN, AND M*GRIGOIt. 



Nysten, and more recently by those of Mr. M'Gri- 

 gor, who found that during the climax of scarlet 

 fever, measles, and small-pox, from twenty to fifty 

 per cent, more carbonic acid was exhaled from the 

 lungs of patients in the Glasgow Infirmary than in 

 a state of health. And it is a striking coincidence, 

 that the pulsations of the heart are augmented in 

 about the same ratio during the hot stage, the 

 tendency of which is to improve the vital proper- 

 ties of the blood, by increasing the chemical 

 function of the lungs in which it is formed and 

 renovated, as shewn by the bright and florid hue 

 which it assumes, the redness it imparts to the 

 skin, and its increased power of coagulating when 

 drawn from the body, compared with its dark, 

 grumous, and vitiated state during the cold stage. 

 But as it is some time before the nutritive 

 properties of the blood are restored, even after 

 respiration is re-established, the caloric thus ob- 

 tained is imperfectly transferred to the solids ; so 

 that there is often a feeling of chilliness while 

 the patient feels preter naturally warm to another 

 person, until the full development of the hot stage; 

 attended with general debility, and a dull pain 

 in the head, back, and limbs, not unlike that 

 which is produced by the immediate influence 

 of external cold ; but with this difference, that in 

 the former case it is more permanent and difficult 

 to remove, because owing to a radical derange- 

 ment in the vital properties of the blood. 



