Mr. Saeltzer’s book is full of good hints. But that is not its chief merit. It recognizes the inseparable connection of sound and ventilation, and insists upon observance of the laws which govern them. As he is so evidently alive to the sanitary and acoustic defects in public buildings, we shall be disappointed if his little volume does not prove to be the preface to more specific, practical directions for their removal. He has put his finger upon the principal cause of failures. The laws of light, and heat, and sound are sufficiently understood to render their phenomena as controllable as time, space, and velocity in mechanics. The more intelligent efforts are therefore directed not to the discovery of new principles involved, but to utilize what knowledge we possess. And when the effort is made at the right point and in the right direction, we can heartily say, Go on and conquer. The world is full of wonderful monuments signalizing defeat. Let us see just one crowned with victory. As yet, modern ecclesiastical architecture, especially, is but the imperfect reproduction of ancient and mediæval models. It is the heathen temple or the Gothic minster, or, more recently, an attempt to vary the monotony with Byzantine forms of old basilicas, without their grandeur. In decoration, we have crude, unmeaning imitations of Moorish tracery, weak in imagery of form and symbolism, without those glowing contrasts and harmonies of colors which are to architecture as rhythm to poetry of sound. We know the cause and history of this poverty in constructive and decorative art. History tells us how men became so spiritual, in their own conceit, that symbolism was held to be a sin; and how, by losing the sign, the thing signified was forgotten or denied. But it seems almost unaccountable that the world should be teeming with _philosophers_, to whom the laws of nature, even their least tangible phenomena, seem familiar as things of daily use, while great temples are so constructed that they who have ears to hear _cannot_ hear. FOOTNOTE: [52] _A Treatise on Acoustics in Connection with Ventilation; and an Account of the Modern and Ancient Methods of Heating and Ventilation._ By Alexander Saeltzer, Architect. New York: D. Van Nostrand, Publisher. 1872. ODD STORIES. I. THE LADDER OF LIFE.