The model 1836 Spectrometer-Goniometer, for the exact measurement of optical data on prisms. It can also be used as a spectroscope, for qualitative examination and measurement of emission and absorption spectra. The observation tube has combined coarse and fine drives, infinitely variable, cross-hairs, eyepiece vernier accuracy, plus 1 minute of arc objective: 18 mm/160 mm. The Prism offers Flint glass (60deg) with a dispersion angle C-F=2deg. The scale tube is a symmetric precision slit of hardened steel. Accessories include prism, Rowland grating and holder, scale illumination, lamp, ocular and spectra sheet.
Brennan & Company 61 Birch Avenue Stillorgan Industrial Park Stillorgan, Co. Dublin A94 XW68
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