ON HEATING PEACH-HOUSES. 19 



No. i size, with three 3-in. pipes at sides of furnace and nine 

 3-in. pipes over fire-box. 



Length of Boiler. *"$$?" 



A, 6 ft. 6 in. ......... I loo ft 



B, 9 ft. 6 in. ......... 1300 ft. 



No. 2 size, with three 3-in. pipes at sides of furnace and eleven 

 3-in. pipes over fire-box. 



A, 6 ft. 6 in. ......... 1500 ft. 



B, 9 ft. 6 in. ......... 2000 ft. 



No. 3 size, with four 3-in. pipes at sides of furnace and eleven 

 3-in. pipes over fire-box. 



Length of Boiler. ^SfgT " 



A, 6 ft. 6 in. ......... 1600 ft 



B, 9 ft. 6 in. ......... 2200 ft. 



The new pattern " Mammoth Rochford " Horizontal Tubular 

 Boiler (with caulked joints). 



Pattern No. 2. Having seventeen 4-in. pipes over furnace and 

 two 4-in. pipes each side of furnace. 



Length of Length of Heating power in 



Boiler. Fire-box. 4-in. pipe. 



A, 7 ft. o in. ... 4 ft. 10 in. ... 2500 ft. 



B, 10 ft. o in. ... 4ft. 6 in. ... 3080 ft. 



C, 15 ft. o in. ... 4 ft. 6 in. ... 3500 ft. 



D, 19 ft. o in. ... 5 ft. o in. ... 4000 ft. 



However, it would be advisable to have two 

 9 feet 6 inch long boilers capable of heating 2000 

 feet of 4-inch pipe each, set side by side, to heat 

 4000 feet of 4-in. pipe, in preference to depending 

 upon one extra large boiler to do the same amount 



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