The Horticulturist s Rule- Book. 



Boltoi? jtot-U/ater Jieater 



for U/armii?<$ I^esidei?ees, Qreepl^ouses, Schools, 

 Hospitals, te., te. 



The Bolton is the most economical, durable and efficient. Its vertical 

 circulation renders its action prompt and rapid. Its fire surface is the largest 

 in proportion to grate surface. No bolted, flanged or packed joints ; there- 

 fore cannot leak. Its brick casing entirely prevents loss of heat In cellar. 

 Wrought iron, therefore cannot crack. Manufacturers also of the COM- 

 BINATION GAS MACHINE, the best "Portable "gas apparatus; furnishes 

 gas in country at less than city prices. 



DETROIT HEATING & LIGHTING COMPANY, 



88 LAKE ST., CHICAGO. WIGHT ST., DETROIT. 



