212 VEGETABLE PARASITES. 



the actual thrush of children under the name of aphthae (' Aphor/ 

 Sect, iii, No. 24). 



2d period. Corruption of this idea by the Roman medical 

 writers, who wrongly translated this word by ulcera. This cor- 

 ruption has been retained front the time of Celsus to the present 

 time, and comprises both Stomatitis vesicularis and S.follicularis. 

 Celsus confounded the real aphthae with all kinds of ulcerous, 

 exudative, diphtheritic, and gangrenous disorders of the mouth 

 and throat, with Stomacace, Noma, &c. Galen confounds the 

 thrush especially with Stomatitis follicularis and vesicularis with 

 their ulcers and others. Aphthae were treated like ulcers by 

 Aretaus, Oribasius, Aetius, Paulus .^Egineta, Primerose (1508) ; 

 Amatus Lusitanus (1551), who describes a case of thrush on a 

 grown-up person taken ill with intermittent fever; Fernelius 

 (1569) ; Ambrosius Pare (1575), who recommends with Ruff the 

 simultaneous treatment of nurses and infants; Mercurialis (1583); 

 Forestus (1591); Herlicius (1597); Sennertus (1646, ulcuscula 

 seu tubercula oris) mentions as remedium fcetidum the frequent 

 sucking at a living frog, which he thought would remove the 

 malignant secretions; Joel (1665, exigua ulcuscula seu pustulse) ; 

 Riverius (1646, the different distinctions of colour are supposed 

 to be produced by bile, mucus, atra bilis, and putrefaction) ; 

 Mauriceau, Riedlein (1698) ; Loew (1699) (Prunella infantu- 

 lorum = thrush) ; Becher (1700); Slevogt (1706) speaks of two 

 species Ulcuscula and Papula, which form vesicles; Boerhave 

 (1709), who was acquainted with the piecemeal loosening, falling 

 off and reappearance of the sloughs, till larger ulcers were formed ; 

 Juncker (1718), observed that they might be wiped off; Dionis 

 (1718); Astruc (1746) ; Cooke (1770) ; Nicolas (1722) ; Plenk 

 (1776, ulcera cutanea) ; Selle (1802) ; Heberden (1804) ; Henke 

 (1810-21) ; Swedians (1812, ulcers, vesicles, pustules; they belong 

 to his Pyrexire, order Phlegmasiae). 



3d period. Return to the name given by Hippocrates. It is 

 scarcely necessary to speak of this as a distinct period, as it only 

 included a few isolated writers who endeavoured to return to the 

 most ancient name, but whose voice, however, was disregarded. 

 I mav mention Pollux (' Onomastic/ 1. iv, c. 24, sect. 200) ; Gir- 

 tanner (1794), who calls them vesicles or spots on the lips; 

 Brassard (1837). 



4th period. Period marked by the endeavours to describe 



