VOL. XXXm.] 1'HILOSOPHICAL TRANSACTIONS. 1 1 1 



also sometimes turn pale, sometimes livid : Symptoms which are very bad. 

 The pustules without the purple speck did not incrust yellow, but appeared of 

 a dead, ash colour, and by degrees took, a dark black crust. 



The salivation, which constantly ought to accompany the maturation in the 

 confluent small-pox, was in several very inconsiderable, in some none at all, 

 excepting a very small quantity of extremely viscid matter, which was got off 

 by syringing. Dr. H. had 2 adult persons, and some children, labouring under 

 the confluent sort, who neither salivated, nor purged, except when some lenient 

 cathartics were given them ; and yet they got over the distemper. Indeed it 

 was very rare to And children have that gentle diarrhoea, which Sydenham and 

 others justly think supplies the salivation in persons of more advanced age. 

 Some very young children, on the contrary, drivelled exceedingly through the 

 course of the distemper. In 2 children, one of 5, the other of 7 years old, no 

 salivation came on till after the 13th day, and then it was so profuse, and con- 

 tinued so long, that it was with difficulty stopped by purges first, and then by 

 the bark, astringents, &c. To the younger of these, indeed the Doctor had 

 given calomel, gr. iv, but it was soon purged ofl^. 



Where the swelling of the face and throat was very hard, painful, and tense, 

 with a strong vibration of the carotid arteries, and little or no salivation, the 

 patients generally became delirious at the state of the distemper. These 

 symptoms frequently proved fatal. The maxillary and parotid glands, of those 

 that recovered, would remain swoln and indurated, for a considerable time after 

 the entire desquamation of the pox, though that were very slow, nor would 

 these tumours go off, but after repeated purging, and that with calomel, &c. 



Those tumours were undoubtedly the consequence of a very viscid matter 

 obstructing those glands, which hardened the swelling of the face, hindered the 

 salivation, and in some measure the circulation, through the external carotids. 

 Under these circumstances, bleeding, emollient clysters, eccoprotics, plentiful 

 dilution, were absolutely necessary. 



On this occasion it may be asked, whether, the salivation being very viscid 

 and defective, the tumour of the face hard and tense, some mercurial, as a duly 

 prepared calomel, might not he given with advantage, even in the state of 

 maturation? The Doctor has frequently given cinnabar to good purpose. There 

 are some instances that would seem to justify such a practice ; and he knows 

 but one material objection to it, which is, that the weight of the mercury would 

 by increasing the momentum of the blood, augment the fever : but surely we 

 have given calomel after the incrustation, when the secondary fever has sub- 

 sisted, without any ill consequence, indeed with great success. 



Nothing so certainly fuses viscous tough humours, being joined with plenti- 



