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Engis offers the largest selection of Mono chromator and Spectrometer systems in the world, with an extensive line of accessories for these instruments, including . . . cameras, de tectors, wavelength modulators, interferometers, lamps (N.B.S. calibration), filters, lenses, densitometers and measuring microscopes. A. Wavelength Spectrometer Β. Prism/Grating Spectrometer C. Vacuum Spectrograph D. Prism Monochromator E. Grating Monochromator
G. Grating Spectrometer H. Instruments modified to meet your specific needs
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ENGIS EQUIPMENT COMPANY Ό ^ ! ^ Ε Ν Τ Α Τ ' Ο Ν 8035
AUSTIN AVE., MORTON
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VOL.
40, NO. 13, NOVEMBER 1968
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111 A
