the distance of the bulb of the thermometer from the floor; for though
similar heats will produce similar
effects in the same situation, yet the distribution of heat in every
kiln is so irregular, that the medium spot for the local situation of
the thermometer as a standard, cannot be easily fixed for ascertaining
effects upon the whole. That done, the several degrees, necessary
for the purposes of porter, amber, pale beers,
&c. are easily discovered to the utmost exactness, and become the
certain rule of future practice. Though
custom has laid this arbitrary injunction of variety
on our malt liquors, it may not be amiss to intimate the losses we
often sustain, and the inconvenience we combat in our obedience to her
mandates.
The further we pursue the deeper tints of colour by an
increase of heat, beyond that which simple preservation requires the
more we injure the valuable qualities of the malt. It is well known
that scorched oils turn black, and that calcined sugar assumes
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