SIR GJLHERT SCQTT RECOMMENDS THE INVENTION. 51 



simplicity ai,d thorough efficiency of this form of ventilator, 

 and in a testimonial which he presented to the inventors 

 the value of which may be conceived when it is mentioned 

 that it is the only one he was ever known to give 

 he says : " Gentlemen, I have used your Patent Self- 

 Acting Air-Pump Ventilators with complete success. From 

 experience of them in my own house and other buildings 

 public and private where they have been applied under 

 my direction, I can confidently and will always have 

 great pleasure in recommending them." This eminent 

 architect fully realised the public importance of the 

 invention when he departed from his rule of reticence 

 to offer such emphatic public testimony to its merits. 

 While most encouraging to Robert Boyle that his invention 

 should be esteemed worthy of such distinguished notice, 

 a vast amount of good was done by Sir Gilbert's frank 

 avowal of its merits, in stimulating architects to adopt 

 systems of ventilation hitherto regarded as impracti- 

 cable. His son, John Oldred Scott, alluding to a ven- 

 tilator put up at St. Margaret's Church, Brighton, 

 wrote to Messrs. Boyle a letter with this significant 

 sentence : " Medical men recommend their patients to attend 

 thin church because of the purity of its atmosplwre" 



Perhaps the most gratifying proof that the inven- 

 tion is one of extraordinary merit and great public 



