Hearing In Large Churches

TLi is now mane as ensy as in tiie tmallsst, by the sucorfss of iq expemnant juut onnplettíd n Trinity Cliuroii, in tliig tiiij. ít consista of a paraboloidal refleeter of s.iu'rl placed at thebick of the pulpit, of which the speaker's uicnith ia tiia f ica. A boim of sound about ten feet in diaiatar, ia thua tbrown to the most remote piiiit of tbe chureh, nnd hy its üoiv filia the whola body of the buüding. Th ütraeture ia i[nta ornamental auá n har inony with tho sreneral arshitecture of the building. AH graat publio building, whötlier fr slng'üig or spetking, m-ij havo asimilar nrrangom 'nt adaptcd to thmr uso. Tlio vho!o of the rear ersd of a building like the Acariomy of .!usio, s'iould bo onc p:iraboloid:il aurfnco. lt is pirtioulariy snitable for lagislatire halla, as it woriri boih waya. A porin sfaüding at tho firt.hast d),)r in Tri'iify Cuuro'i o tn carry on a ooaTertfction with 0:10 in tha pulpit in the lowet tonas, efei iu a whispor Any porsa:i wull acquiinted with tho hiher mithe;natics and aaoufstomsd to raake eouttoietiötn in arohiteatare, enginesrina; r ra.ioliinary, is wmpatent to sanarintond ach sn erectior. The ono in Tri.úty O )urah tas pat up under thu supervisan of Professor BUokluy, f Oolumhi öollega, ia thi o;tj -