The Frontier Mail was one of the first trains in India to get an air conditioned car. In fact, the a.c. car started running from 1934. However, the airconditioning system was basic, nothing like the thermostat controlled powerplants we see today.
The airconditioning system in those days used ice blocks, carried in sealed receptacles built beneath the car floor. These were replenished at several halts along the line. A battery operated blower constantly blew air into these receptacles, and the cold air entered the insulated cars through vents. Very basic, very messy, but the effect was very pleasant indeed. Today, the thought of huge ice blocks being pushed into the underfloor ice receptacles at every other stop is daunting enough!
FIRST AIR CONDITIONED COMPARTMENT [INDIANS WERE ALLOWED INSIDE?! OR WAS IT ONLY FOR THE WHITE MEN AND ENGLISH RULING CLASS?ANY BODY KNOWS? I DONT KNOW BECAUSE THERE WAS NO AIR
CONDITIONED METER GAUGE TRAIN BETWEEN TRIVANDRUM AND QUILON ON THE WAY TO EGMORE MADRAS(CHENNAI) WHICH WAS THE ONLY RAILWAY LINE THEN -BEFORE COCHIN TRIVANDRUM RAILWAY LINE WAS MADE IN 1965]