His examples of the steam-engine are nearly all from American models, and include the oscillating engines of the "Golden Gate," the last important advance in the construction of the marine engine; for, although the form of the oscillator has been known for years, it had never been applied to marine uses until the success of the "Golden Gate" proved its applicability to the heaviest engines. The examples of architectural details and ornaments are copious, and represent all styles with great fairness; but there is much confusion in the numbering of the plates, so that it is a problem at times to find the illustration desired. The tinted illustrations, though answering their proposed purpose, are a disgrace to the art of lithotinting,--coarse, ineffective, and cheap. The publishers, we think, would have profited by a little more liberality in this respect.