File:The Emporium of arts and sciences (1812) (14786129413).jpg

Identifier: emporiumofartssc02coxe (find matches)
Title: The Emporium of arts & sciences
Year: 1812 (1810s)
Authors: Coxe, John Redman, 1773-1864, ed Cooper, Thomas, 1759-1839, ed
Subjects: Industrial arts Technology Technology
Publisher: Philadelphia : published by Joseph Delaplaine Philadelphia : Kimber & Richardson
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and the National Endowment for the Humanities

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io of sound in the three front boxes comparedwith that of the first quarter of the pit, is as one sixteenthto one; this, by the reflection of half the roof will be re-duced to about one seventh, hence these parts will hearnearly as well as the centre of the pit. In addition tothis, the back of each tier of boxes should be covered soas to give a focus of sound either to the front, middle, orlast benches, as thought best, this shown at 1, &, 3. Thetwo latter were altered from the former by dotted coves.The fronts to the boxes should present reflectingcurves, to throw their sound within the fourth region ofthe pit. Fig. 3 is a hind view, showing the proper curve of theroof in this position, where the only object is to keep thediverging rays of sound parallel after reflection, and clearof the sides of the boxes. I think it w^ould not be particularly expensive to havethe whole beam and pillar work of the theatre of cast tyt (/.(fri//ri/ri ////in /(<■/ // r//.y//;/-.30 ob __ &o
Text Appearing After Image:
/.,<: £mpo7mm,ofyirls SC Sciences Vol. 2. PI. 10. Tieb On the Construction of Theatres. 353 iron; and likewise to make the elliptical part capable ofbeing completely cut off from any fire in the other part ofthe building, by a jointed sheet iron curtain, to close upthe stage every night after performance, or in case of fire,during tlie play hours. The name of this would be veryattractive. To prevent the bad effect of squeezing from suddenalarms, no door about a theatre should open inwards, andthe outlets should be as large as possible, and some extraones easily opened if necessary: a good reservoir of wa-ter, and an engine or two on the spot, are precautions tooobvious to need an observation* I am, &c. j GrEORGE CaYLEY* To John Kemble, Esquire. NO. 69. On the Construction of Theatres. By Richard LovelyEdge worth, 1£ squire, F. R. S. &fc* Edgeworthstown, March 6, 18096Sir—The public, by the loss of two theatres in onewinter, must be anxious about the plans on which those

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