PHOTOMICROGRAPHIC CAMERAS and PROJECTION APPARATUS

Photomicrographic Camera, by Zeiss, eyepiece type, for roll films, £ with extension body to carry gx 12 cm. plates or film pack, one metal dark slide and one film-pack adapter .. .. .. . . 18

Zeiss Planar Photomicrographic Lens, Series ia No. i, f/4.5, f =

2 cm., R.M.S. thread .. .. .. .. .. .. •.. 4

Gordon’s Photomicro. Camera, by Beck .. .. .. .. 3

Universal Projection Apparatus, for :—

1. —Microscopic objects under high, medium, and low magnifi-

cations.

2. —Lantern slides.

3. —Small opaque objects.

The apparatus consists of a “ Service ” Microscope with rackwork coarse and vertical lever fine adjustments, with sliding draw-tube, “ Service ” pattern attachable mechanical stage, compound rack substage with centring screws, dustproof triple nose-piece, with 1", and Parachromatic objectives, eyepieces x6 and X 10. The microscope is mounted in a horizontal position, on saddle fittings on a triangular bar.

The accessories for transparent and opaque projection are as follows:—

Large cooling trough.

Double lantern-slide holder.

Auxiliary condenser.

2" diameter lantern-slide projection lens, in rack focussing mount with adjustable reflex mirror.

Adjustable platform for small opaque objects.

3" diameter projection lens for opaque objects.

10-amp. arc lamp, with mechanical adjustments, housed in metal lantern body, with 8£" diameter compound lantern condenser.

The illumination for all three methods of projection is by means of the 10-amp. arc lamp and the change over from one to the other is extremely quick and simple.

The apparatus is mounted on an adjustable cast-iron stand. Price .. .. .. .. .. .. .. .. .. .. 50

Baker School Micro-projector, complete with Nature Microscope,

spare focussing sleeve, projection lens, etc... .. .. .. 7

Projection Lantern, suitable for a science laboratory, consisting of an adjustable baseboard, having metal mounting thereon, body of lantern is made of mahogany ; there is a cooling trough and alternative illuminants, consisting of arc lamp (without resistance), high-wattage electric lamp and reflector, adjustable condenser, wide-aperture lantern projection lens, microscope body with revolving fitting for three eyepieces, dustproof triple nose-piece, built-in iris diaphragm with fine adjustment, and separate saddle carrying mechanical stage .. .. .. .. .. ..10

Edinger Apparatus, by Leitz, for projection drawing, and microprojection, complete with stand, arc lamp, etc. .. .. .. 10

Metal Microscope Floor Stand, by Ogilvy. Consisting of Watson -Conrady illuminating system for visual work, a triangular bar and metal table, mounted on heavy metal tripod foot. The triangular bar carries five saddles, the first of which holds a cylindrical metal lamp-housing, suitable for a ribbon filament lamp. This housing is fitted with an iris diaphragm, and can be moved either in a vertical or a horizontal direction by means of rack and pinion.

The second saddle holds a Watson-Conrady Aplanatic-Achromatic

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Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 98,43 %.

La langue de reconnaissance de l'OCR est l'Anglais.

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