July 1931

july – john haven emerson of cambridge, massachusetts perfects negative pressure ventilator ( iron lung ) in time growing polio epidemic.
july 1 – rebuilt milano centrale railway station officially opens in italy.
july 9 – irish racing driver kaye don breaks world water speed record @ lake garda, italy.
july 13 – royal soldiers shoot , kill 22 people demonstrating against maharaja hari singh of indian princely state of kashmir , jammu.
july 16 – emperor haile selassie signs first constitution of ethiopia.
july 26 – millennialist bible student movement adopts name jehovah s witnesses @ meeting in columbus, ohio.
july 31 – may report in united kingdom recommends extensive cuts government expenditure. produces political crisis many members of labour party (at time in government) object proposals.




^ bbc history, july 2011, p12.
^ j&k observes martyrs` day: cm omar pays tributes . zee news. 2011-07-13. retrieved 2011-12-18.