For anyone who must engage in the tedious measurements of many line deflections with a non-recording microphotometer, saving of time is worth considering. Most photometers require several hand manipulations per reading—location of the line, correction for parallelism, reading traverse, etc.—plus the recording of each item of data. We suggest that the recording step may be efficiently accomplished by speaking into a tape recorder rather than by writing the data down. The hand and eye are thus relieved of one assignment and the reading rate improved.
W. H. Dennen and W. H. Blackburn, "Tape Recorder Speeds Photometry," Appl. Spectrosc. 23, 377-377 (1969)
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