. Beck microscopes. Microscopes. No. 3404. Slide with silver film, with fine pinholes under cover glasses of three different thicl^nesses No. 3404A. Simple form with only one thickness of cover glass ... No. 3379. Apertometer No. 3385. Brass diaphragm for use in eyepiece with above ... No. 3665. Tube length corrector No. 3379. 7]-,is appliance, designed by the British Scientific Instrument Research Association, screws into the nosepiece of the microscope above the object glass. It consists of two fully corrected optical systems, the separation of which can be varied by turning a milled ring. I
. Beck microscopes. Microscopes. No. 3404. Slide with silver film, with fine pinholes under cover glasses of three different thicl^nesses No. 3404A. Simple form with only one thickness of cover glass ... No. 3379. Apertometer No. 3385. Brass diaphragm for use in eyepiece with above ... No. 3665. Tube length corrector No. 3379. 7]-,is appliance, designed by the British Scientific Instrument Research Association, screws into the nosepiece of the microscope above the object glass. It consists of two fully corrected optical systems, the separation of which can be varied by turning a milled ring. It has the effect of altering the tube length for which an object glass is corrected without impairing its optical properties. No. 3358. Iris diaphragm to screw into nosepiece of microscope to reduce aperture of object glass. £0 12 6 0 3 0 0 6 0 0 1 6 7 10 0. 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 Beck (R. & J. ) Ltd. London : Beck
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Keywords: ., bookcontributorgerstei, bookleafnumber86, booksubjectmicroscopes
