. Beck microscopes. Microscopes. Beck Barnard ultra-violet m'.croscope. Complete outfit. Approx. I size. Fig. 1 shows a bird's eye view of the apparatus with its screens and camera removed, consists essentially of four parts :— It (A) (B) (C) (D) (A) A massive iron bedplate (A, Fig. 1). The microscope (Figs. 2 and 3 and B, Fig. 1). The optical bench for illumination with visible light {C, Fig. 1). The optical bench for ultra-violet illumination (D, Fig. 1). The main bedplate is a heavily ribbed iron casting of great strength and rigidity. The microscope is placed at its narrow end fitting into
. Beck microscopes. Microscopes. Beck Barnard ultra-violet m'.croscope. Complete outfit. Approx. I size. Fig. 1 shows a bird's eye view of the apparatus with its screens and camera removed, consists essentially of four parts :— It (A) (B) (C) (D) (A) A massive iron bedplate (A, Fig. 1). The microscope (Figs. 2 and 3 and B, Fig. 1). The optical bench for illumination with visible light {C, Fig. 1). The optical bench for ultra-violet illumination (D, Fig. 1). The main bedplate is a heavily ribbed iron casting of great strength and rigidity. The microscope is placed at its narrow end fitting into three slots, which accurately locate the three toes of the microscope (B, Fig. 1) and thus its accurate alignment with the rest of the apparatus is ensured. The two optical benches (C and D) are fixed to the main bedplate. This bedplate is supported on three feet. A series of tapped holes {e, Fig. 1) are provided, into which pillars are screwed, to support screens to enclose the illuminating apparatus. (B) The microscope is illustrated in Figs. 2 and 3. It consists of an iron casting (/, Fig. 3) of great rigidity which stands on three toes. Upon it are two dovetail slides {g and h). The slide (g) carries the focussing unit {k) and the slide (A) carries the substage (j). Running in a slide in the casting and below the slide (g) is a long bar (l). It carries an adjustable bracket (m) to support the fluorescent eyepiece («) with provision for accurately aligning it with the main eyepiece. The bar is provided with a clamp. The stage (o) is supported on a massive bracket (/') which is part of the main casting. It is held down upon an accurately flat surface fitting on three small raised areas by three springs. A very accurate lateral motion of about 1 cm. in each direction is imparted to the stage by means of the adjusting screws {p). The slide holding the object consists of a quartz slip-5 m/m. thick, and a fused quartz cover glass is used. The slide is held on the 67. Please n
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Keywords: ., bookcontributorgerstei, bookleafnumber75, booksubjectmicroscopes
