HOW TO DO IT 



as an nnusnal thing ; and when I said that the ITniversity 

 of Pennsylvania had taken all animals, from men to birds, 

 in motion, and had published a series of plates containing 

 thirty thousand phototypes, I was stared at politely but 

 reproachfully and incredulously. We are given credit for 

 very little abroad. The simplest thing you tell a foreigner 

 runs the risk of being looked at as a gross exaggeration. 

 I have had intelligent people gaze at me as if I had been 

 spinning a monumental yarn, to put it mildly, because, ^^.p-.. 

 I told them that T^ittsburg had for years been lighted and 

 heated and had its factories driven by natural gas, or that 

 petroleum was transported by pipe-lines, over hill and dale, 

 from the oil-fields, several hundred miles, to the ocean. 



When I was a small boy, the elevator in the Continental 

 Hotel in Philadelphia was already running, and it was 



