International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 201
Fig. 349. Fig. 347. Fig. 348. Grass land is represented by irregular groups of shortdiverging lines, as shown in Fig. 348. Uncultivated land is shown by inter-spersing the signs of sand, grass, bushes,etc. ; cultivated land by parallel row^s ofbroken lines, as in Fig. 349. Swamp land is represented…
Railroad engineering
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