NEW RESEARCHES UPON PLEURO-PNEUMONI A, ETC. 
513 
prove that the local artificial lesions, brought on by inoculation, 
has the greatest resemblance to the morbid lesions and processes 
observed in the lungs of animals which have contracted disease 
under the epizootic influences of pleuro-pneumonia. 
Mr. Didot says, The discovery of these corpuscles constitutes 
a fact too important to be allowed to pass unnoticed; therefore 
the Central Commission thought of it, and Dr.Willems was asked 
to make a special demonstration of it before the Commission. 
Their existence was observed by all the members, as it had been 
by M. Willems and Van Kempen. Prof. Gluge alone considered 
them as one of the ordinary products of inflammation.” 
After these first demonstrations, Mr. Voigtlander of Germany, 
Ercolani of Bologne, and Dr. Gastaldi in Italy, proved that there 
exists in pneumonic animals peculiar corpuscles other than those 
met in the single phlegmasia, and that, consequently, I was right 
in attributing to them a special origin and nature. 
“ Our first care,” these Italian savants say, “ was to look for 
the elementary granules with peculiar motion of Willems. With 
this object, one took pieces of lungs, in the part which was most 
diseased, and we were charmed to find numerous groups of small 
corpuscles more or less closed to each other. 
“ These groups would separate, under a moderate pressure, into 
a variable number of granules or corpuscles, about the size of blood 
globules, the form of which they somewhat resemble ; that is, 
they were spherical, concave in the center; nevertheless, trans¬ 
parent and having their outlines well marked and dark. 
“ Treated with pure water, their form is not in the least altered ; 
the same condition remains when treated by acetic acid, only that 
they then become more transparent, because while the corpuscles 
remained intact, the portions of the lung where they were became 
clearer and more transparent. 
“ These corpuscles seemed of the same nature as those found 
by Guerin-Meneville in the blood of insects, and were considered 
by him as parasites , and which he called hematozoaires. 
“ These elementary granules exist as rarely in the lungs as in 
the skin, where, however, they were more numerous and are col¬ 
lected and circumscribed in smaller groups. But we did not find 
