Illustrations of the theory and practice of ventilation : with remarks on warming, exclusive lighting, and the communication of sound (1844)
Reid, D. B. (David Boswell), 1805-1863 · London : Longman, Brown, Green, & Longmans · leaf 336
lling the attention of all present to the progressof individual experiments when they became most interesting andinstructive. In the class-room I built in 1833, it was statedby every individual almost who visited it while in progress, andwho adverted to the subject, that I never would be heard,… … lowest altitude compatible with the wants of the place, and onthe absorbing nature of a rough and inelastic floor, made of an 312 COMMUNICATION OF SOUND. earthy composition, such as allowed that freedom which was ne-cessary where so many furnace operations were conducted. 694. Fig. 239 indicates…
