KnowraPhotographic plateLinked fromLinked fromThe 22 pages that link to Photographic plate, each with the reason it gives.All 22Broader topic 4Related 14Narrower topic 3Compared with 1Harvard ComputersBroader topic: Many Harvard classifications began with measurements made directly from these plates.Williamina FlemingBroader topic: Fleming inspected these plates to identify objects and compare stellar spectra.Margaret Lindsay HugginsBroader topic: Long exposures on plates made faint spectral details available for careful examination.History of the cameraBroader topic: Plate cameras preceded flexible film and imposed size and handling limits.