. Beck microscopes. Microscopes. No. 3172. No. 3174. The optical properties of this series of magnifiers are of the highest order, giving a large, fiat field of view free from distortion and colour. They are mounted in strongly made nickel plated mounts and are supplied in leather cases. Cat. No. Dia. of lenses. Magnifi- cation. Working distance. Dia. of field of view. i s. d. 3171 1" X5 T4" 1-3" 1 2 0 3172 •625" Xl2 •5" •6" 1 2 0 3173 •325" X20 •375" •3" 1 5 0 3174 ^ •625" XlO& •8" & •7" & 1 Double y & ^325" X20
. Beck microscopes. Microscopes. No. 3172. No. 3174. The optical properties of this series of magnifiers are of the highest order, giving a large, fiat field of view free from distortion and colour. They are mounted in strongly made nickel plated mounts and are supplied in leather cases. Cat. No. Dia. of lenses. Magnifi- cation. Working distance. Dia. of field of view. i s. d. 3171 1" X5 T4" 1-3" 1 2 0 3172 •625" Xl2 •5" •6" 1 2 0 3173 •325" X20 •375" •3" 1 5 0 3174 ^ •625" XlO& •8" & •7" & 1 Double y & ^325" X20 •375" •3" [ 1 18 6 Magnifier J _,. No. 3700 Worlishop magnifier. This magnifier is made in two powers, x5 and X 10, and is mounted into a substantial fitting with foot, and screw focussing motion as illustrated. The field of view given is flat and free from distortion and colour. Cat. No. Magnification. Dia. of held of view. i s. d. 3700 3700A X5 XlO T4" 1 1 0 1" 1 10 0 109. 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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