CLASS II. 1. 5. 11. OF SENSATION. 



M. M. Cover the eruption daily with ink. With white mer- 

 curial ointment, as described above in herpes. With solution of 

 white vitriol ten grains to an ounce. These metallic calces sti- 

 mulate the absorbents into stronger action, whence the fluid has 

 its saline part reabsorbed, and that before it has access to the air, 

 which probably adds to its acrimony by oxygenating it, and thus 

 producing a new acid. 



11. Tinea. Scald head. This contagious eruption affects the 

 roots of the hair, and is generally most virulent round the edges 

 of the hair on the back part of the head; as the corona veneris 

 appears most on the edges of the hair on the fore part of the head: 

 for in these parts the eruption about the roots of the hair is most 

 exposed to the external air, by which its acrimony or noxious 

 quality is increased. 



The absorption of the matter thus oxygenated swells the lym- 

 phatics of the neck by its stimulus, occasioning many little hard 

 lumps beneath the seat of the eruption; when this happens, the 

 sooner it is cured the better, lest the larger lymphatics of the 

 neck should become affected. 



M. M. The art of curing these eruptions consists, first, in abat- 

 ing the inflammation, and consequent secretion of a noxious mate- 

 rial. Secondly, in preventing its access to the air, which so much 

 increases its acrimony. And thirdly, in promoting the absorption 

 of it, before it has been exposed to the air. For these purposes 

 venesection once, and gentle cathartics, which promote absorption 

 by emptying the blood-vessels. Next poultices and fomentations, 

 with warm water, abate inflammation by diluting the saline acri- 

 mony of the secreted fluid, and abating the painful sensation. 

 Afterwards cerate joined with some metallic calx, as of zinc or 

 lead, or solution of lead, mercury, or copper, or iron, which may 

 stimulate the absorbent system into stronger action. 



Cover the shaved head with tar and suet, and a bladder; this, 

 by keeping the air from the secreted fluid, much contributes to 

 its mildness, and the stimulus of the tar increases its absorption. 

 See the three preceding species of this genus. 



Mr. Morison of Dublin cures the tinea capitis by what he terms 

 an adhesive paste, which is made by boiling half a pound of fine 

 flour in two pounds of common ale, and then adding four ounces 

 of yellow resin in fine powder, and stirring them well together, 

 until they are perfectly incorporated. After removing the hair, 

 and poulticing the head for a day or two, to take off the hard 

 scabs, this paste is spread on slips of linen, which are applied 

 over the whole affected part, and removed, and fresh ones applied 

 every morning; after one or two days, I suspect, that removing 

 the plasters seldomer might be morr advantageous. 



