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wowwwwwwwww…achchhaa…i am glad to hear that…so u’ve some idea…one way that i’m aware of is very intuitive which i will share in a couple of days. aother way to keep cool during long dusty journeys was to amke the salons AIR-COOLED by covering the windows with a mesh made by dried grasses called “Khas kii TaTTii” over which water wud be sprinkled at major stations. in those days, trains didn’t run more than an hour or two without stops unlike now in India where trains run non-stop for 7-9 hours.**