514 PROCEEDINGS OF THE AMERICAN ASSOCIATION 
growing in favor here; and it is to be hoped that those makers who have 
heretofore made only one style of stand will soon offer both; so that buy- 
ers can choose their style of stand irrespective of their choice of makers. 
In objectives and accessories Tolles; Wales, Zentmeyer, Grunow, Spencer, 
to be assumed by all members as a settled question. Few members, o 
the other hand, fall into the present fashion of high power objectives, — 
preferring to use lenses of 1-15 or 1-16, and downward, and gain greater 
amplification by other means than by ^pnind the nominal focus of the 
objective. 
Dr. Josiah Curtis exhibited a micro-telescope, or microscope and tele- 
scope combined, made to his order by Tolles. It is an ordinary Cutter's 
pound microscope acts as an erecting eye-piece. Furnished with a proper 
support this makes an admirable pocket telescope, defining well at pow- 
ers of forty or fifty diameters. 
Mr. Tolles had mounted a 2 1-2-inch lens with the society screw on each 
side of the shoulder, so that it can either be screwed on in the usual posi- 
giving, by approaching the eye-piece, about the power of a 4-inch lens at 
e usual distance. Microscopists have been accustomed to gain a lower 
power than could be focussed by their rack, by screwing a low objective 
not be used with the ordinary Binoculars. 'The lens, though of second 
class, was very good. i 
r. Tolles has also arranged a 4-inch objective in which a short work- 
ing focus is obtained by a reducing lens in the rear. This reducing lens, 
for convenience, is mounted in a sliding tube, and gives when pushed in 
a fair 3-inch power. As a 4-inch the combination is extrem mely good. _ 
Mr. Bicknell applies this expedient to ordinary objectives; placing in 
the draw-tube, instead of the concave amplifier sometimes used, an ach- 
pene convex lens as a reducer, with which an extremely low power 
n be obtained with good definition, flat field, and working focus not in- 
wr tibeten long. A4 1-2 or 5-inch lens (solar focus) may be used. A 
ow objective of two combinations may be sii is using one part as an 
objective: and placing the other in the draw-tu 
r. Ward had contrived a “clinical” ipse for use with the mi- 
donc of the same name. The clinical microsc cope is very convenient 
for examining mounted specimens, which is exactly what it is not wanted 
