Fig. 94 is a sketch of a blow-lamp suitable for the
horizontal boiler shown on pp. 204, and 206, while Fig. 95 shows a
convenient form of paraffin stove with silent "Primus" burner, which may be
used for a horizontal with considerable furnace space or for vertical
boilers. In the case of all these liquid fuel consumers, the amount of heat
developed can be increased by augmenting the number of burners. Where a gas
supply is available its use is to be recommended for small stationary
boilers.
Solid Fuels.--The chief disadvantages attaching to these are smoke and
fumes; but as a solid fuel gives better results than liquid in a large
furnace, it is preferred under certain conditions, one of them being that
steam is not raised in a living room. Charcoal, coke, anthracite coal, and
ordinary coal partly burned are the fuels to use, the fire being started
with a liberal supply of embers from an open fire. Every solid-fuel boiler
should have a steam-blower in the chimney for drawing up the fire; and if a
really fierce blaze is aimed at, the exhaust from the engine should be
utilized for the same purpose.
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