No coin nor oath required. For personal study only.
Procecdm,~s, etc.
[J. F. I., discussed, while otbers have been entirely overlooked. One brief page is โข devoted to the methods of examining how effectively sugar has been decolorized in passing through bone-black ; but a description of the process ofdecolorizing sugar for comparative tests, which should precede this, has not been given.
Bone-black itself has, it is much to be regretted, been almost entirely ,passed over. On p. To 7, we are shown how the weight of a cubic foot of this substance may be ascertained; but with this exception there is little or nothing said about it. it is true that the analysis of bone-black is foreign to ~the subject-title, but in view of the almost inseparable connection of sugar and bone-black, the value of the work would have been much increased, both to the practising chemist and also as a " hand-book of instruction in schools of chemical technology," if some space had been devoted to it. We find no mention of either the sttgar-caneor the sugar-beet ; but this we regard as a very important omission. A chapter might advantageously have been devoted to the detection of foreign substances in sugar. Thus, a description of the best methods of finding tin, ultramarine, the various artifical coloring :matters, etc., would have added to the value of the book.
After recording these and passing over similar omissions, we can highly โข commend the book to all interested in sugar analysis, as bringing down the subject to the present date in a concise and practical form. The book contrains a valuable and very complete set of tables.
S.C.H.
๐ SIMILAR VOLUMES
Proceedings, etc. 79 plane trigonometry, and, indeed, in some few cases, in analytical geometry, though these last may be omitted without serious lack of continuity. Part I of the work, which is before us, contains 246 pages. It gives in its introductory matter, concise, illustrated descriptions of
The vacancy was filled by the election of Mr. S. LLOYD WIEGAND. He also reported a resolution of the Board, recommending that a set of the JOURNAL be presented to the University of Toronto, the buildings and library of which Institution had been destroyed by fire. The recommendat;vfl was unanimousl