| 1876.] Microscopy at the International Exhibition. 725 
of the ruins, are entirely obliterated by the ravages of centuries. 
We can simply go back a few hundreds of years and infer that 
these inscriptions may have been copied from still older ones, 
which have long since disappeared. 
These discoveries are the results of the explorations of several 
parties of the United States Geological and Geographical Survey 
= of the Territories, in charge of Prof. F. V. Hayden, and Plates 
_ XIll.and XIV. have been kindly furnished to me by him for this 
paper, 
MICROSCOPY AT THE INTERNATIONAL EXHIBITION. 
BY R. H. WARD, M. D. 
P briefly reviewing the microscopes exhibited at the Ameri- 
can Centennial Exhibition, just closing at Philadelphia, it 
will be convenient to classify them in three more or less natura 
groups: the Continental, English, and American. All these 
classes are largely and characteristically represented by the most 
interesting and in many cases by the most distinguished exam- 
ples of their kind, affording to microscopical students the best 
_ portunity yet furnished in this country to study and compare 
the various types and qualities of tools available for their mon 
It will be expedient to mention first, however, a few isolate 
and unclassifiable exhibits which are still of sufficient interest to 
F mand a passing notice, such as a very small upright papo 
_ tional microscope of no well-marked character, from Switzerlan ; 
- 4 small instrument from Tokio, Japan, which is evidently m 
early if not a first attempt, and a not unsuccessful nne; yap 
: of unpretending form and crude workmanship, to imitate = 
| struments in vogue in this country a score of years ago : ” : * 
' — Couple of large, clumsy instruments one 0 
. “i Montreal and the other in the a S ap 
oronto, of which it can only be hoped taa 3 
_ Rpresent the sion” te on our Canadian friends, since si 
_ te wholly devoid of any evidence of the spirit of gia 
Which has so fully and so fortunately changed the ees po 
from a Piece of furniture to a tool for scientific work, an nye a 
act excellent illustrations of what a microscope ought no% 1 
“œ educational purposes. 5 
: The oraa AA are chiefly negepoenied by 1 ee 
- hibit of Nachet, of Paris, whose compact, ingenious, ela pe ie 
a 
< roughly built instruments are present 1m large nu 
