54 THE REV. NEWMAN HALL. 



tions are either half suffocated with foul air and heat, or 

 subjected to dangerous draughts ; but the popularity of 

 Mr. Boyle's invention has led to its adoption in a great 

 many places of worship. 



One of the first churches in London to which the 

 Air-Pump Ventilator was applied was the Rowland Hill 

 Memorial Church. The Rev. Newman Hall after several 

 years' experience of it says : " I consider our ventilation 

 very successful." 



When the ventilator, which is 6 feet diameter, was 

 tested by the architect and others it was found to be 

 extracting the foul air at the rate of 360,000 cubic feet per 

 hour, with only a gentle breeze, and there was not the 

 slightest down-draught. 



Mr. Spurgeon's new college in connection with the 

 Tabernacle, Newington. Butts, is ventilated with the Air- 

 Pump Ventilators; and as indicating Mr. Spurgeon's satis- 

 faction with them, it may be mentioned that he has recently 

 adopted them for the new Tabernacle which is being built 

 in Auckland, New Zealand, for his son, the Rev. Thomas 

 Spurgeon. 



Mr. Alfred Waterhouse, A.R.A., the eminent Architect, 

 in a letter to Mr. Boyle, referring to his appliances in use at 

 Eaton Hall, says : " I am glad to hear good reports of 

 your Cowls fixed at the Duke of Westminster's house." The 



