i6i [ INH. 
they are placed in a heatcd iron vessel, on a com- 
mon fire shovel heated, and the vapour arising da- 
ring liquefaction is taken in by holding the head 
over the vessel or utensil employed. 
The simple inhalations are, aqueous vapour, that 
arising from vinegar, or vinegar and-water. 
The medicated aqueous inhalations, are decoc- 
tions of medicinal herbs, chiefly of the verticillate 
and corymbifere, of chammomile flowers with a_ 
little ether added, and of some bitter, astringent 
plants. The vapour of hot decoctions of some 
roots is also used ; I have administered senega in 
this way, with advantage. | 
The actherial inhalations are, the spontaneous 
volatilization of sulphuric and nitrous ether and 
oil of wine, weak dilutions of aqua ammonia, 
common spirit of hartshorne. the volatile refined 
vinegars of the shops, and similar volatile medi- 
cine: 
__. ‘The vapour of fragrant and stimulating balsams, — 
are, the fumes obtained from gum elemi, camphor, 
benzoin, storax, olibanum, labdanum, common 
white rosin, burgundy pitch, hemlock gum, and 
the terebinthinate exudations or concretes of the 
conifer, as tar. 
The vapour of nitre, sulphur, and quicksilver, are 
obtained by heating to the point of volatilization. 
The fumes of tobacco by the pipe, or burning the 
dried leaves or segars in a close room, by per- 
sons not addicted to the habitual stimulus of the 
plant as a luxury. The fumes of stramonium 
_ root, of the flowers gnaphalium margaritaceum, 
or common life everlasting, and various other ve- 
getable products, haye-also been medically ased. 
