105 
the Foramina Thebesii of the Heart. 
examination of the heart of those patients who died. In these 
cases, I found, that by throwing common coarse waxen injec- 
tion into the arteries and veins of the heart, it readily flowed 
into the cavities of that organ ; and that the left ventricle was 
injected in the first place, and most completely. When the 
ventricle was opened, and the effused injection removed, the 
foramina Thebesii appeared both numerous and large, and dis- 
tended with the different coloured wax which had been im- 
pelled into the coronary arteries and veins. Upon eight com- 
parative trials, made by injecting the vessels of hearts taken 
from subjects whose lungs were either much diseased, or in a 
perfectly sound state, I found, that in the former, common in- 
jection readily flowed, in the manner which I have described, 
into all the cavities of the heart, but principally into the left 
ventricle ; whilst, in many of the latter, I could not impel the 
least quantity of such coarse injection into that cavity. 
This difference in the facility with which the cavities of the 
heart can be injected from its nutrient vessels, was observed 
by most anatomists, though they did not advert to the cir- 
cumstances on which it depended. Haller's recital of his 
own observations, and of those of others on this subject, so 
well explain the facts which I have stated, that I shall take 
the liberty of quoting the passage, in order further to illustrate 
and authenticate them. He says, “ Si per arterias liquorem in- 
“ jeceris, perinde in dextra auricula, sinuque et ventriculo dextro, 
“ et in sinu atque thalamo sinistro guttulae exstillabunt ; ssepe 
“ quidem absque mora, alias difficilius, et nonnunquam omnino, 
“ uti continuo dicemus, et mihi, et SENAco,et clarissimo Zinnio, 
“ nihil exsudavit .’’—Elem. Physiol Tom. I. page 382. 
As it seems right that the blood which had been distributed 
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