4O2 



FARM MOTORS 



gravity. The few experimenters who took up the work continued in 

 this line with more or less improvements until 1860, when Lenoir 

 brought out the first really practical engine. This was very similar 

 to a high-pressure steam engine using gas and air. Among these 

 early experimenters, those who seem most prominent are Barnet, in 

 1838, inventor of flame ignition and compression, and Barsanti and 

 Matteusee, who, in 1857, produced the free piston. 



554. Later development. Million gave the first clear ideas of 

 the advantages of compression, and M. Beau de Rochas went further 

 and produced a theory analogous to our present type. In 1867 Messrs. 

 Otto and Langdon produced a free piston engine which superseded 

 all previous efforts, but it was left to Mr. Otto to put into practice 



FIG. 280 PARTS OF GASOLINE ENGINE 



