Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 101
f o. i per cent,solution of benzene in ethyl alcohol. The lengths of solution usedare indicated on the side of the plate. It is unfortunate that repro-duction does not do justice to the very fine detail that is presentin the original plate. This photograph is taken with a Hilgerquartz spectrograph,… … NoAbscrtlicnUeZ MM.4 MM.6 MM.-S MM.10 MM.;5MM.^OWM.25 MM.30MM.35MM.40^fM.45MM.50MM.55MM,60MM. .55,r1^^ two minute exposure on a Seeds 2^ plate. One and six-tenths k.w.were used in the primary of the transformer. The top exposure in Fig. 3 with no absorption tube indicatesthe uniformity of the…
Science · Technology · Meteorology · Patents
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