Show 0 Pr o of transcontinental travel The Th trip from the Pacific Pa- Pa CI a o Cell Lemur Tr a- a 1 d ic to Atlantic l can be bc made in In 28 hours by air air- 0 J plane In 1830 it took the prairie schooner six months to cover the same sanle distance S 0 I 1931 UNITED 1931 UNITED A AIR LINES INAUGURATE 1 28 HOUR 28 HOUR COAST COAST- COAST TO COAST TO-COAST PASSENGER PLANE SERVICE 0 Jl Q CL TIC o Jl NEW I 0 c. c i S o o l O C tt 4 o. o r 0 C o CC 0 C S 0 p 0 O 0 0 of oO 00 00 o oSAN O 0 IUNUS SAN 0 Sf LOUIS C FI OX TOM TEAM 6 MONTHS STAGE 21 2 DAYS DAYS DAYS' 44 PONY EXPRESS 18 1869 9 FIRST II DAYS FROM ST ST. STLOUIS LOUIS RAILROAD 7 DAYS NEW YORK TO CALIFORNIA A CENTURY OF TRANSCONTINENTAL TRAVEL |