A PROBLEM TO SOLVE. 45- 



Robert Boyle and his son never contemplated building up 

 a great business by supplying people with the means of 

 breathing pure air. It was a matter which directly affected 

 the welfare of teeming millions, and this was enough for the 

 enthusiastic inventors, who, in the midst of scientific researches 

 and the fascinating labour of peering into the grand mysteries 

 of nature, never forgot that the true value of knowledge was 

 to be found in its application to the wants of their fellow 

 men. A powerful and constant exJiaust, which would 

 unceasingly pump the foul air out of buildings, without 

 requiring any attention, was the principal problem to solve. 

 The result of investigation and experiments in this direction 

 was the famous Air-Pump Ventilator. 



