61, p. 444), and the instrument contains many elegant mechanical and optical details due to Horace Darwin and Messrs Zeiss respectively.
In the apparatus of type B as made by Zeiss there are two microscopes attached to a base-plate, one of which views the spectrum-plate (or other object) to be measured, while the other views a scale that moves with the slide on which the spectrumplate is mounted.
After experiments in the Zeiss works, the erecting of Porro's prisms simultaneously permitted a convenient adaptation to the eye-distance of the observer.
The refractometer constructed by C. Pulfrich (of the firm of Zeiss, in Jena) has been successfully used by G.
Zeiss made a periscope 7 metres long, main tune 150 mm.
The collection of the scientific staff of Carl Zeiss at Jena, edited by M.
-¦ rapqamnoIWARU (By permission of C. Zeiss.) FIG.
The correction-collar was improved by Wenham and Zeiss, by working the upper system upon the lower, and not the reverse; for in this way the preparation remains almost exactly focused during the operation (see fig.
- Achro tive fitted with cormatic objective for r e c t i o n collar homogeneous immer (Zeiss).
Abbe in 1878 in the Zeiss workshops at the instigation of J.
- Compensating Eyefocus for red, and a longer one for pieces (Zeiss).
- Abbe Illuminating Apparatus with Ordinary Condenser (Zeiss).
- Cylinder Diaphragm (Zeiss).
In Zeiss's form (fig.
- Vertical suitable adjustment and by changing Illuminator (Zeiss).
(Objective D can also be used as a condenser (Zeiss).) Th.
This defect has been avoided in the instruments constructed in the Zeiss factory (fig.
In other fine adjustments by means of springs and balance wheels either a micrometer screw is moved (Zeiss), or a curved disk fixed to the balance wheel is turned (Leitz), or an oblique disk arranged more or less in a circle and attached to the balance wheel is revolved (Reichert).
- L Arge Dissecting Stand (Zeiss).
59.-Greenough'S Binocular Microscope (Zeiss).
61.-Petrographical Microscope (Zeiss).
Sectional elevation and plan (Zeiss).
- Abbe's Apertometer (Zeiss).
This is a Zeiss phase condenser with the top cover removed for clarity.
I cannot show some images directly from my scope unfortunately because I don't own the 30mm diameter Zeiss phase telescope.
Zeiss and Steinheil's monocentric eye-pieces and the Cooke single achromatic eye-piece (fig.
Mach published a promising idea, and finally-independently of the researches of his predecessors-Hektor de Grousilliers, in partnership with the Zeiss firm (E.
Zeiss Victory T FL 8x42- top of the line binoculars for the avid birdwatcher.
The Go-Optic.com lab is backed by over 40 years of experience in the optical field, and has established relationships with some of the biggest lens companies in the market, such as Varilux, Zeiss, Esilor, Hoya and many more.
Zeiss Nose Pads: The nose pads here are bayonet shaped for maximum comfort.
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