AMERICAN Institute
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hMEkICAH I's E SV''' Z MN ! I7.'''1. N
ING, Nov 27.-Ths subject for last evenings
conversation was, the Drafts of Chimnies and
vcatilation.' Professor Mapes introduced the
subject, and the preface 10 Mr.. David B. RAIDS
work upon ventilation was read by the Secretary
The Importance OF This matter is obvious to every
one, but attention had not been especially drawn
10 it, until the appointment Of Commlttee o
the House OF Commons 10 investigate the sub
iect in 1895. Professor Rcid's book is an elaso
rate treatise upon the subject. Mr.. Mott then
proceeded to exhibit different chimacy-caps, and
10 test heirvaluc by experiments.


- nj fne