. The microscope and microscopical methods. Microscopes; 1896. Fig. 67. Krauss' Method of Mark- ing Objectives on a Revolving Nose- Piece. As seen in the figure, the equiva- lent focus of the objective is engraved on the diaphragm above the back lens and may be very readily seen in ro- tating the nose-piece. This is of great advantage and facilitates the chang- ing of objectives, as one can see what objective is coming into place with- out Figs. 68-69. The Mechanical Stage {% 116; Both these mechanical stages have the great advantage of large movement in both directions
. The microscope and microscopical methods. Microscopes; 1896. Fig. 67. Krauss' Method of Mark- ing Objectives on a Revolving Nose- Piece. As seen in the figure, the equiva- lent focus of the objective is engraved on the diaphragm above the back lens and may be very readily seen in ro- tating the nose-piece. This is of great advantage and facilitates the chang- ing of objectives, as one can see what objective is coming into place with- out Figs. 68-69. The Mechanical Stage {% 116; Both these mechanical stages have the great advantage of large movement in both directions, so that a series may be studied with great certainty and facility, Both have scales and verniers, so that the position of any particular feature of a preparation may be readily re found The figures on the scale being different there is never doubt as to the position of each from the record. Fig 68. The TollesMayall mechanical stage as constructed by Leitz. It is shown in position on the stage of the microscope : it is fastened to the stage by a pin and screw near the pillar. Fig. 69. The TollesMayall mechanical stage made by the Bausch & Lomb Optical Company. It is separated from the microscope. It is attached to the microscope by a clamp surrounding the pillar. This form of connection was employed by Reichrrt & Zeiss in the earlier forms devised, and is still used by theni. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gage, Simon Henry, 1851-1944. Ithaca, N. Y. , Comstock
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmicroscopes, bookyear
