This historic book may have numerous typos and missing text.
Purchasers can download a free scanned copy of the original book
(without typos) from the publisher. Not indexed. Not illustrated.
1912 Excerpt: ...common setting of the water tube boiler, where the
flames rise vertically among the tubes from the grate surface, and
good combustion is impossible. With the unprotected eye the flames
will appear to be giving light all the way from the fire surface to
between the tubes. Combustion appears fair. If, however, these
light-giving flames be examined by the aid of violet glass, they
will be cut down to short tongues of flame projecting but little
above the fire surface. Even these tongues of flame give forth
little illumination. Above the flames the gases appear to be simply
dark-coloured streams of gas, soot laden and murky. The violet
glass or analyser has cut out all the rays of small actinic power
and small temperature, with the result that the only remaining
light rays are those immediately above the furnace. The effect of
radiation is to cool the flames below the range of violet long
before they have risen to the level of the tubes. Apparently there
is nothingbut ra diation to explain the reduction of temperature.
This method of analysis of the products of the fire is useful not
merely because it enables a furnace interior to be visually
examined with ease and comfort, but because it shows so clearly the
effect of a good design and the bad influence of premature cooling.
It affords most conclusive testimony to the benefits that accrue
from proper design, and should be an effectual silencer of those
who argue that smoke is one of the unfortunate inevitables of
combustion in place of being but a proof of ignorant and careless
design and neglect of the plainer principles of chemical science.
The use of violet-coloured glass is essential. It is not simply
that it is requisite to reduce the amount of light which meets the
eye and renders vision impossible. Such...
|Country of origin:
William Henry Booth
||246 x 189 x 4mm (L x W x T)
||Paperback - Trade
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