418 PROCEEDINGS OF SOCIETIES, 
mated, Dr. D. stated that he had seen the Malpighian bodies 
filled with nuclei, but he did not regard this alteration in struc- 
ture to be such an one as would give rise to the clinical pheno- 
mena so well known to characterise post-scarlatinal dropsy. While 
the epithelial lining of the convoluted tubes was observed to be 
not much altered, a most striking manifestation was the large 
amount of exudation (granular matter) to be seen in the convo- 
luted tubes. It is the blocking up of the excretory ducts of the 
organ which the author regarded as explaining best the symptoms 
of the disease. The various characters of this pathological pro- 
cess were well illustrated by specimens exhibited. 
At the third meeting of the section, held on February 26th, 
Mr. R. Parker read his ‘Supplementary Note on the Mammary 
Gland, with an account of the Salivary Glands and Pancreas, 
compared together.” After describing the anatomical resem- 
blances and differences in these three organs, Mr. Parker drew 
attention to the fact that it is only during parturition and lacta- 
tion that the mamma is an actual secreting gland, while at other 
times it is latent, though ready to assume active functions. Having 
described the microscopical characters of the mammary gland 
before, during, and after its period of activity, Mr. Parker pro- 
ceeded to detail the varieties of cancerous growth affecting this 
organ, and which for the most part commence in the terminal 
acini. He drew attention to the three varieties of carcinoma, 
viz., “ acinose ” and “tubular” (which are the most usual forms 
of this disease), and the less common variety “true scirrhus, or 
shrinking cancer.” The two first have their seat in the secreting 
acini of the gland; of which, indeed, they are clearly abnormal 
overgrowths, differing in a manner implied by their names. The 
initial seat of the last kind is a matter of dispute, but is probably 
rightly referred to the lymphatic endothelium of the organ. 
While in acinose cancer the morbid growth proceeds centrifugally, 
in tubular cancer the disease worms its way in tortuous, tubular 
tracks. The author’s remarks were illustrated by a beautifully 
complete series of specimens. 
The fourth meeting of the section was held on 9th April, 1875. 
Dr. Davidson gave a brief account of ‘‘ Brown induration of the 
lungs from chronic congestion, in heart disease.” Where there 
is impeded circulation, especially that resulting from mitral con- 
traction, there results over-distension of the capillaries. Next 
follows structural alteration of the capillaries, from their becoming 
tortuous, and from varicosities or dilatations being formed. The 
amount of interstitial tissue is next increased, and the alveolar 
walls are thickened. Lastly, there is an escape of leucocytes 
and of red corpuscles, and these latter, being absorbed, leave 
behind pigment deposits in the walls of the alveoli, and in the 
interior of the alveolar epithelial cells, while the alveoli them- 
selves become filled with epithelial cells. These remarks were 
well illustrated by specimens exhibited. 
Mr. M. Harris next drew attention to the head of a Tenia 
