The Bobbs-Merrill Reprint Series in Geography

25 miles wide 50 miles air routes airplane approximately areas Atlas automobile average based chiefly belt 25 miles bulky freight cable cents per ton-mile century ago changing world Commerce COMMUNICATION MAPS costs of transport countries day FIG day's devices devise different dates distance driver ECONOMIC-BARRIER MAPS Europe experimental map fastest available feasible to travel fences Geographers graphic hard-surfaced roads heights highways Historical Geography horseback human increase international boundaries isotachic map mail was carried Main Post Roads map is experimental MAP TYPES means of transport miles a day miles per day motor truck NATIONAL ECONOMIC BARRIERS Philadelphia plate pony porters Possibly Public Roads railroad Railway readily represented revision shaded shown similar maps single city Staley surface means tariff walls telegraph time-table tion train TRANSPORT COSTS transport per ton-mile Travel speeds TRAVEL-SPEED MAPS unit costs vastly vehicle visualize width World Economy world maps York