Ebert grating spectrograph E543 by Hilger & Watts Ltd., London, 1967-1968 Ebert grating spectrograph E543 by Hilger & Watts Ltd. 1967-1968
selection of 8 sets of diffraction rulings on polished steel, 7 of 8 in individual cylindrical wooden cases, one loose, with 6 diagrams of rulings on card, in velvet-lined leather covered case, by Robert Bancks (unsigned), London, England, c. 1826. selection of 8 sets of diffraction rulings on polished steel 1820-1829
Diffraction grating 1800 gr/mm on 6 inch diameter blank, produced by interference Diffraction grating 1800 gr/mm on 6 inch diameter blank
Diffraction ruling on glass sheet, 8 x 8cm with circular grating. 6.5cm diameter. Marked 6000. Diffraction ruling on glass sheet
Diffraction grating on glass approx 1cm on thin glass disc 32mm diameter. In glass topped box. Diffraction Grating on Glass
Perkin-Elmer Grating Infrared Spectrophotometer type 157G Perkin-Elmer Grating Infrared Spectrophotometer