The essentials of illustration, a practical guide to the reproduction of drawings & photographs for the use of scientists & others (1915)
Hill, Thomas George, 1876- · London, W. Wesley & Son · leaf 123
squares are sufficient. If theoriginal be plotted on paper which is ruled in pale blue,it can be reproduced by line block without re-drawing,since the blue will photograph as white with the platescommonly used ; all the essential lines and curves must,of course, be in black. If, however, the… … OOLITES ^a CORNBRA^H ^^OXFORDCLAY ^^COR ALLIANKIMERIDGE CLAY IMK:! LOWER C.RE.ENSAND ^^CAULT [T^CHALK[M^FEN GRAVELS [ivT^ P^AT PH SILT Figure 37. A Map of the Fenland by Prof. Yapp.{New Phytologist, 1908, Vol. 7) 80 MATERIALS lines should be much thinner. The actual curve maybe in a continuous line…
Engraving -- Printing · Illustration of books · Photomechanical processes
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