Microscopes at the American Exhibition. By J. G. Hunt. 21 
bottom of a sulcus. Now in the human Insula the same arrange- 
ment holds good, the fibres for the most part curving round the 
cortex at the bottom of the sulci, instead of passing upwards into 
the grey matter. 
With regard to the blood-vessels and neuroglia of the Insula, I 
have been able to observe no peculiarity calling for special descrip- 
tion or remark. 
Such, then, are the conclusions to which I have arrived, and 
with their brief recapitulation will close this the first part of the 
present inquiry. 
In reply to the four questions proposed at the outset of this 
article, I would answer as follows : 
1. The cortical layers of the Insula agree in number, order, and 
general arrangement with those of the vertex, but the cells of the 
third layer are in the Insula generally smaller than at the vertex. 
The vessel and neuroglia present no peculiarity. 
2. The various gyri forming the Insula present similar struc- 
ture. 
3. No difference of structure can be detected in the right as 
compared with the left Insula. 
4. The method of union of the white matter with the cortex is 
in the Insula similar to that observed in other lobes . — The West 
Biding Lunatic Asylum Medical Reports, vol. vi. 
V. — The Microscopes at the American Exhibition. 
By J. Gibbons Hunt, M.D., of Philadelphia, Pa. 
[The following observations are remarkable from the bluntness, 
or rather sharpness, with which they are expressed. Still, if the 
reader will make the necessary allowances, they will not be found 
devoid of interest. — Ed. ‘ M. M. J.’] 
After a great Exhibition, like the one recently held in our city, it 
may not be unprofitable to note some facts which have a bearing on 
that branch of human skill and science which is supposed to be 
cultivated in this section of the Academy, viz. microscopy. 
Conscious incompetency would deter me from attempting a 
description of all the microscopical exhibit offered at our Centennial. 
I will ask you, therefore, to consider with me some subjects in 
which you and all workers with microscopes are interested, but 
which did not and could not find fitting expression in the reports of 
the eminent judges on that occasion. I take it for granted that we 
are at liberty to speak of the results of work, without embracing 
with admiration or neglecting with total indifference the workman, 
