67'i PHILOSOPHICAL TRANSACTIONS. [aNNO 1702. 



sponge being moistened in balsam proper for the lungs, before it is put into the 

 tube, as bcgh. 



But considering, that if the said sponge did not touch the sides of the glass 

 in every p;irt, the air would pass by it, where there was no resistance, as also 

 that the air would with difficulty pass through the linen or sponge that was dipt 

 in balsam, especially if that were thick; I rejected this tube also, after all my 

 preparations, and took another of the same length and size with the former, 

 with this difference only, that it was throughout of the same width. This tube, 

 which is represented by mnop &c.' fig. 18, I stopped at each end with a cork, 

 as at MNWx and pqst. In this last cork, I made a small round hole quite 

 through, in which I strongly fixed a small glass tube r ; and so also I perforated 

 the other cork MNWX. This done, I thrust into the lowermost cork another 

 long crooked glass tube, yz, tapering to a slender end as za, that the air when 

 sucked in at r should come in leisurely at the straight passage za. 



Having thus disposed the large tube, with the cork so strongly screwed in 

 it, and the small tube in the cork, that not only no water, but even no air 

 could enter in it, I judged that I had quite finished my machine. To make 

 an experiment how it might succeed, I drew the cork pqst out of the tube, 

 and poured a little brandy in it, as in novw; then having placed the said cork 

 with the little tube in it, into the large tube again, and putting the small tube 

 R between my lips, and sucking in the air, which rushed in at the small end 

 a of the tube yz, and which was obliged to pass through the brandy, I per- 

 ceived the brandy to be put into a violent agitation and bubbling, by which its 

 spirits, if I may so call them, were made to rise in an extraordinary manner up into 

 the mouth, and consequently into the lungs, as the event plainly demonstrated. 



If then the exhalations or volatile particles of balsams are rendered service- 

 able, not only for comforting, but even for curing diseased lungs, the more 

 spirits of these balsams can be conveyed into the lungs, so much the better; 

 but I would not have the air pass so simply through the balsam, as it went 

 through the brandy, when the tube should be filled with the former so far as 

 it is with the latter, but intended to put the glass tube, so far as it is 

 filled with balsam, in hot water; however, in order to prevent the bursting of 

 the tube by too sudden a heat, it ought to be laid in a bason fit for the pur- 

 pose, with some cold water, pouring softly a little boiling water upon it to the 

 height of the balsam, or else to lay the tube in a bason with the necessary 

 quantity of water, and put it upon the fire. By this means the spirits of the 

 balsam will exhale much more freely than when cold, and the lungs will be 

 thus so heated, as to put the patient into a gentle sweat. I have often thought 

 too, that these balsams, or at least some cordial gums, herbs, or juices, are 



