A CHRONOLOGY OF THE GAS ENGINE

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Route 1, Box 110, Prairie du Sac, WI 53578 submitted the following table reprinted from the November 1911 issue of Gas Power.

The following table of leading dates in the history of gas engine progress is taken from the fifth edition of 'Gas, Oil and Air Engines,' by Byran Donklin. Approximate dates are given.

First horizontal Lenoir French engine, water jacketed, with slide valve (40 cubic feet of gas per I. h. p. hour.) Electric ignition...........................................................................................................................................................1861
Hugon Gas Engine. First with ignition slide valve..............................................................................................1863
Otto and Laugen's atmospheric engine.............................................................................................................1886
Practically very few English makers of gas engines, perhaps one or two............................................................1870
Bisschop engine, made by Andrews.................................................................................................................1877
Robson, compression on one side of piston and ignition on the other.................................................................1877
First Clerk engine with air pump and compression............................................................................................1877
First horizontal Otto engine, Crossley (25 cu ft gas per I. h. p. hour).................................................................1879
Robson, first starter of compressed gas in reservoir..........................................................................................1879
Firms making gas engines in England-Simon, Andrews, Tangle, Robson and others........................................1880
Dowson first gas producer.....................................................................................................................1878-1880
First porcelain tube ignition, Watson.................................................................................................................1881
Heat efficiency of the best engines 10 to 15 per cent.........................................................................................1882
Best heat efficiency of Otto engine (5 to 15 I. h. p.), 15% (taking indicated work).............................................1887
First Otto-Crossley without slide......................................................................................................................1888
Society of Arts' trials-Otto-Crossley engine, 22% heat efficiency (taking B. h. p.)...........................................1888
First Daimler gas engine...................................................................................................................................1889
First timing valve, Otto-Crossley engine over 100 B. h. p.................................................................................1889
Expiration of Otto patent in England.................................................................................................................1890
Maximum power 200 to 300 I. h. p. engines in England, France and Germany........................................1890-1894
Approximate number of firms making gas engines-England 30, Germany 30, France 20, Switzerland 5.......... 1895
Power gas ?-lb. to 1-lb. good anthracite coal per B. h. p., 50 to 200 h. p. ..................................................... 1895
Heat efficiency, 16% to 25% in best engines (taking B. h.p.).............................................................................1895
Maximum initial pressure in cylinder about 200 lbs............................................................................................1895
Largest engines made about 300-400 I. h. p....................................................................................................1895
First application of blast furnace gases..............................................................................................................1895
Largest gas engine made 1,500 I. h. p..............................................................................................................1899
Heat efficiency of the best engines per B. h. p., 25% 23 B. h. p........................................................................1899
Number of firms making gas engines-about 50 in Great Britain.......................................................................1899
Mean pressure in latest engines about 110 lbs. per square inch.........................................................................1905
Largest gas engine made, 5,400 h. p................................................................................................................1905
Heat efficiency of the best engines per B. h. p., 29?% (65 B. h. p.)..................................................................1905
Largest gas engine made, 5,400 h. p................................................................................................................1909