The Turners' Manual, being a Translation of the Work by
L. E. 'Bergeron. Edited by D. A. Mid. (F. Offen, 8 York Street, Covent Oarden.)—If the editor is enabled to carry out what ho has undertaken, this work, which is published fortnightly, will prove a great help to amateur mechanics. There are at present very few books which are really useful to amateurs, either because they plunge too suddenly into intricate wouk, or have no plates; but judging from the first few numbers, we think this book will not commit either of these mistakes. All the plates are very clear, but thoro is that far too t ommon fault of not numbering all the figures with the numbers stated in the text. And in plate 9, Part V., tho arrangement of the figuros is so complicated that it taltos a long time to find any particular one. Of course, all tbeso blemishes can be prevented in future numbers, but it is a pity more care is not taken to make a book which will be so very useful to mechanics as porfoot as possible.