The Annual Cycle of Some Minor Elements in Linsley Pond (North Branford, Connecticut) as Determined by Optical Emission
A procedure is described employing a Jarrell Ash direct reading optical emission unit. A special optical arrangement was developed for this study. A 55 mm focal length, spherical quartz lens was used in the arc stand to focus the electrodes’ image on a variable aperture located on a rider base on the optical bar. This aperture is closed down to eliminate the incandescence of the electrodes entering the instrument. A 135 mm slit mounted lens was employed to permit the light passed by the mask to completely fill the grating.
KeywordsAnnual Cycle Optical Emission Watch Glass Variable Aperture Rider Base
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