Cork insulation; a complete illustrated textbook on cork insulation ...

STRUCTURAL SUGGESTIONS 199
many practical experiments were, and still are, being made, to determine
to just what extent relative humidity can be carried before it
becomes objectionable and dangerous in other respects; this led to
many differences of opinion, as each example of practical results was
modified by specific conditions pertaining particularly to the individual
room; these conditions were not fully understood or taken into consideration
in the conclusions; therefore, a certain relative humidity,
which proved correct or beneficial in one room, or house, proved
incorrect in another; then, too, the method and manner employed for
FIG. 67.—MEAT STORAGE' COOLER WITH OVERHEAD TRACKING AND
COIL ROOM ABOVE.
determining humidity was often open to question, as was also the
correctness of the determination.
Humidity determinations taken in a room are often of no value in
fixing the relative humidity immediately surrounding the goods, due
to sluggish air movement or definite pocketing of the surrounding air,
such as, for instance, goods contained in tight barrels or other tight
or semi-tight packages, goods wrapped in paper, or goods piled tight,
without channels between them.
As a rule, there is very little trouble encountered in securing
humidity; the difficulty lies in controlling it and maintaining it constant;
therefore, the tendency is to proceed very carefully and not
overdo it.