Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 520
= inertia-frequency) per sq. cm.of plate be multiplied at each point by the area itself, the resultantcurve should give, to a first approximation, the first derivativeof the density-exposure function, when expressed in suitable units.Such curves are given in Fig. i, as constructed from the original… … hDen.-Exp.2-lnt Area-Rec.Area i4 5 Recip.Area 9 Exper Emuls. No.2 -^Cone. y^ 2.00 100 /^^ 1 0 X C3 .yf 1.50 /I A 1.00 50 j / hDen.-Exp.Z-lnt.Area.-Ree.Ar Veo / .50 1 y 10 ZO Exposure 30 12 3^ bRecipAread 9 If now the curve No. i, A and B, and No. 2, A and B (Fig. 4),are integrated graphically, the…
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