The microscope and its revelations (1901) (14786917943)

Identifier: microscopeitsrev00carp (find matches)
Title: The microscope and its revelations
Year: 1901 (1900s)
Authors: Carpenter, William Benjamin, 1813-1885 Dallinger, W. H. (William Henry), 1842-1909
Subjects: Microscopy Microscopes Natural history
Publisher: Philadelphia, P. Blackiston's Sons and Co.
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library



Text Appearing Before Image:
long the bar, and it can be clamped atany given point by the upper milled head. The milled head at theside, by pressing on a loose plate, fastens the bar securely to theaquarium. 268 THE HISTORY AND DEVELOPMENT OF THE MICROSCOPE Between the ends of the bar slides an arm carrying a sprungsocket, and the arm can be clamped at any given point of the bar.Through the socket is passed a glass cylinder, cemented to a brasscollar at the upper end. and closed at the lower by a piece of cover-glass. Into t his cylinder is screwed the body-tube of the microscopewith eye-piece and objective, which are thus protected from thewater of the aquarium. The microscope is focussed by rack andpinion (milled head just below the eye-piece), and in addition theobjective is screwed to a draw-tube, so that its position in the cylindermay l»e approximately regulated. The arm of the socket is hinged to allow of the microscope being ,faffs- ^. =r--^gt»(,-=- a? -~- <i*F±r r^ .--.T/f.^.r,-v,7r;?.-:- ••\-r
Text Appearing After Image:
FIG. 210 inelined ina plane parallel to the sides of t he aquarium. The loAVermilled liead clamps the hinge at any desired inclination. IIie sockel also rotates on the arm, so thai tlie microscope can beinclined in a plane parallel to the front of the aquarium. Thus anypoint of t he aquarium can be readied. As an adjunct, and admirable aid to the student of t he lank and pond, as \\ell as a simple and easy means by which specific forms of microscopic life may lie found and readily taken, ue call attention the lank microscope of Mr. <. Kolisselet. It is illustrated in fig. -1 1 and scarcely needs Further description. ne of Zeisss Steinheil aplaiiatic lenses, to which we ha\e MR. ROUSSELETS TANK MICROSCOPE 269 of theupon referred, is carried on a jointed arm, which is clamped to the tank,1the tank being nowhere deeper than the range of focus of the lensemployed. The arm moves on a plane parallel to the side of thetank, and the lens is focussed by means of a rack and pinion,a