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E.F.L. Book 48 No series reductions in this book made with magns. on scale of HC 170. Magns. depending on scale readings 9.7 and fainter (13.7 and fainter with scale R) underlined in this book and wherever copied. October 26, 1914. Scale U was generally used for MC series, (blue) but for the following series other scales are used | Series | Plates | Scale | | 333 | 6405-16 | V | | 398 | 7204- | V | | 360 | 6733 - | V | | 397 | 7183 - | V | and plates after page 206.