26 Microscopy at the American Exhibition. By R. H. Ward. 
allowed to pass as his own, there are dainty pocket microscopes in 
eases of wood or nickel-plated metal, clinical, tank, and dissecting 
microscopes, and a few accessories, which, though not absolute 
novelties, are at least not usually seen on sale in this country. 
The most conspicuous and possibly the most worthless article in 
this exhibit is a huge inverted microscope, as big as a small stove- 
pipe, in which great amplification is gained by means of the great 
distance between the ocular and the objective. 
Bardou and Son, of Paris, also exhibit, in connection with a 
large display of telescopes and other optical goods, one large in- 
strument of the French style, having no important characteristics, 
and a few inferior instruments. 
Austria is represented by 8. Plossl and Co., of Vienna, whose 
little case contains a compact histological microscope of excellent 
design and attractive appearance. In place of a rack, a pair of 
arms attaches the body to the milled heads near their circumfer- 
ence, changing the rotary to a plunging motion, as if the driving 
wheel of a steam-engine moved the piston-rod, and giving a very 
delicate adjustment just as the body approaches a state of rest. 
Accompanying this instrument is a clinical one, of the German 
style, and far simpler than the French, English, or American 
forms. 
The handsomest case of instruments in the English department, 
and indeed in the whole exhibition, is that contributed by the Ross 
house, of London. Less than this could hardly be true of a finely 
finished show-case well filled with their almost unequalled work- 
manship. With the exception of the new Wenham adaptation of the 
Jackson form of stand, and the series of new Wenham objectives 
which are understood to have been entered for competition and then 
permanently removed from the exhibition and the country, there is 
but little in the exhibit that would be called novel, most of the forms 
seen being the familiar and standard styles of several years past. 
No better commendation of the new stands, whose beauty is uni- 
versally conceded, could be desired than is furnished by the old 
style Ross stands exhibited by their side. Notwithstanding the 
solid workmanship of the latter, and the care with which they were 
doubtless packed for transportation, the transverse bar which joins 
the body to the rack has in nearly every case given way under 
some unfortunate jar and become hopelessly though not conspi- 
cuously deformed. ‘The untimely removal of the set of compara- 
tively unfamiliar objectives from the exhibition could not have been 
an intentional breach of courtesy or propriety, but was certainly 
an unfortunate mistake on the part of both the proprietors who 
desired and the officials who permitted it. 
R. and J. Beck’s exhibit is perhaps the most complete in the 
exhibition, but is so badly displayed as to present a scarcely 
