All About Engines
Forfatter: Edward Cressy
År: 1918
Forlag: Cassell and Company, LTD
Sted: London, New York, Toronto and Melbourne
Sider: 352
UDK: 621 1
With a coloured Frontispiece, and 182 halftone Illustrations and Diagrams.
Søgning i bogen
Den bedste måde at søge i bogen er ved at downloade PDF'en og søge i den.
Derved får du fremhævet ordene visuelt direkte på billedet af siden.
Digitaliseret bog
Bogens tekst er maskinlæst, så der kan være en del fejl og mangler.
_______
________ _____
Raising Steam 63
tight joints, and the boiler
may either be built in brick-
work or be furnished with an
iron casing for the grate.
These boilers are very
seldom seen in England, but
they are common enough on
sugar plantations and in other
industries on the outskirts of
civilisation. They are cheap,
but neither economical nor
very safe. A great deal of
heat is lost from the sides and
dry back, and scale tends to
settle on the bottom of the
shell over the fire. The metal
at this point tends to become
overheated, it ex- ________________
pands,and subjects I.......
the boiler to strain. \
It does excellent y------------
work, and is safe
enough in intelligent hands,
but it is a boiler to avoid if
you can afford a better one.
A very early improvement,
and one which is fairly com-
mon to-day, is the Cornish,
which is similar to the Lan-
cashire boiler shown in Fig.
z
o
a
z
0
r
u
u
0)
£
*
27. It consists of a large