Publisher's Synopsis
Excerpt from Royal Institute of British Architects: The Transactions, Session 1883-84
The question of shaft versus fan, has already been discussed in my former Paper, and by Dr. Armstrong in his remarks appended thereto, but it may be well to repeat the caution that competing draughts should never be introduced into a chemical laboratory. No two opposite ways should be provided for the escape of air, and as the draught closets cannot well be too efficient, the whole of the air of the laboratory may be extracted through them.
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