March 23, 1907 HORTICULTURi: 415 



A Friend to Greenhouse Men 



THE HOLLY CASTLE CIRCULATOR 



No long arguments, invoked theories or bewildering figures needed to demonstrate its merits. 



IT WORKS 



It makes the Boiler Work. It makes the Water Circulate. 



It has been installed in many large establishments and is giving full satisfaction. 

 Write to Robert Simpson, Clifton, N. J., Julius Roehrs Co., Rutherford, N. J., J. N. 

 May, Summit, N. J., F. R. Pierson Co., Scarborough, N. Y., Joseph Fuller, Leo- 

 minster, Mass., Perennial Gardens Co., Toledo, O., or Christ. Winterich, Defiance,©. 

 The Circulator is working in each of these establishments. 



We are now prepared to contract for installing our new 



STEEL PLATE BOILER 



built especially for hot water greenhouse heating, also piping and fitting according to 

 most approved methods, in economical manner and with satisfaction guaranteed. Write 

 to us for particulars and testimonials from these who have used this boiler during the 

 past season. 



THE CAST IRON BOILER FOR GREENHOUSE HEATING IS DOOMED 



HOLLY CASTLE COMPANY 



HEATING ENGINEERS 



170 Sutnmer Street, Boston 



