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The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Enemies of Books by William Blades: before you can altogether forget it. But with all its faults it
confers a great boon upon students, enabling them not only to work
three hours longer in the winter-time, but restoring to them
the use of foggy and dark days, in which formerly no book-work
at all could be pursued.[1]
[1] 1887. The system in use is still "Siemens," but, owing to long
experience and improvements, is not now open to the above objections.
Heat alone, without any noxious fumes, is, if continuous, very injurious
to books, and, without gas, bindings may be utterly destroyed by desiccation,
the leather losing all its natural oils by long exposure to much heat.
It is, therefore, a great pity to place books high up in a room where heat of
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