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THE POPULAR SCIENCE MONTHLY. 



an engine exerting one third of a horse-power, boiler, water, and every- 

 thing. Of course, even if the model had been a success, no large 

 machine constructed in such a way could be of practical value. 



The machine designed by Mr. Moy in 1874 was somewhat similar 

 to Ilenson's and Stringfellow's, There are two inclined planes, one 

 behind the other, and two horizontal screws. The necessary speed to 

 lift the machine was to be obtained by a preliminary run along the 



Fig. 7.— Mot's Aeriai. Steamer. 



ground on the wheels underneath. In coming to earth again we 

 should only need to look out for some favorable locality, strike tan- 

 gentially, and the resistance of the wheels over stones, fences, and the 

 like would speedily bring us to rest. 



These are the more important inventions of this class — that is, self- 

 raising and self-propelling machines — and it must be confessed the 

 results are far from encouraging. M. Penaud and others have con- 

 structed flying models, but on too small a scale to be of much practi- 

 cal importance. 



But still there are the birds ; they completely refute the argu- 

 ments of those who say, " It is impossible to build a successful flying- 

 machine." 



MODERN SCIENCE AND MODERN THOUGHT.* 



By S. LAING, M. P. 



On yet we tmst that somehow good 



Will be the final goal of ill, 



To pangs of Nature, sins of will, 

 Defects of doubt, and taints of blood; 



That nothing walks with aimless feet ; 



That not one life shall be destroyed, 



Or cast as rubbish to the void, 

 "When God bath made the pile complete; 



* From Chapter VII of a work, under this title, published by Chapman & Ilall, Lon- 

 don, 1886. 



