197 



space taken up by the apparatus is very large, and it would, 

 therefore, be better to work it in countries where land is of 

 small value. The cost of the large amount of ground which 

 the installation covers seems to me a factor which will have 

 to be taken into account. 



The CHAIRMAN : Gentlemen The hour is getting late, and I 

 will now terminate these proceedings by expressing to Mr. 

 Shuman our very cordial thanks for his most interesting paper. 



Mr. SHUMAN : Gentlemen I thank you very much for the 

 attention you have given to an entirely new subject, and I 

 know it will arouse a great deal of thought. One of the 

 unfortunate things is that if we want to go into this question 

 deeply, and understand everything connected with it, it would 

 take in the first place two or three weeks' thinking over, and 

 afterwards a couple of weeks' discussion to make everything 

 clear in detail. We shall learn a great deal more about sun 

 power, but we are already in a state of higher efficiency than 

 the steam boiler was, comparatively speaking, fifty years ago; 

 and the steam boiler had already had about TOO years 

 of development before that. There was a time when all your 

 coal treasures lay underground in England; nobody knew of 

 their worth. They were not even used for burning in houses 

 300 years ago, and were not used for mechanical power 160 

 years ago. There were all those treasures lying idle, and not 

 used at all. Now you have in the tropics a treasure a million 

 times more precious, because it is perpetual and can never 

 give out. 



