FORE:Founding and casting relate to forming parts of machinery by pouring melted metal into moulds, the force of gravity alone being sufficient to press or shape it into even complicated forms. As a process for shaping such metal as is not injured by the high degree of heat required in melting, moulding is the cheapest and most expeditious of all means, even for forms of regular outline, while the importance of moulding in producing irregular forms is such that without this process the whole system of machine construction would have to be changed. Founding operations are divided into two classes, known technically as green sand moulding, and loam or dry sand moulding; the first, when patterns or duplicates are used to form the moulds, and the second, when the moulds are built by hand without the aid of complete patterns. Founding involves a knowledge of mixing and melting metals such as are used in machine construction, the preparing and setting of cores for the internal displacement of the metal, cooling and shrinking strains, chills, and many other things that are more or less special, and can only be learned and understood from actual observation and practice.Within the last twelve years several books, both large and small, have appeared, dealing either with the philosophy of Aristotle as a whole, or with the general principles on which it is constructed. The Berlin edition of Aristotles collected works was supplemented in 1870 by the publication of a magnificent index, filling nearly nine hundred quarto pages, for which we have to thank the learning and industry of Bonitz.161 Then came the unfinished treatise of George Grote, planned on so vast a scale that it would, if completely carried out, have rivalled the authors History of Greece in bulk, and perhaps exceeded the authentic remains of the Stagirite himself. As it is, we have a full account, expository and critical, of the Organon, a chapter on the De Anima, and some fragments on other Aristotelian writings, all marked by Grotes wonderful sagacity and good sense. In 1879 a new and greatly enlarged edition brought that portion of Zellers work on Greek Philosophy which deals with Aristotle and the Peripatetics162 fully up to the level of its companion volumes; and we are glad to see that, like them, it is shortly to appear in an English dress. The older work of Brandis163 goes over the same ground, and, though much behind the present state of knowledge, may still be consulted with advantage, on account of its copious and clear analyses of the Aristotelian texts.276 Together with these ponderous tomes, we have to mention the little work of Sir Alexander Grant,164 which, although intended primarily for the unlearned, is a real contribution to Aristotelian scholarship, and, probably as such, received the honours of a German translation almost immediately after its first publication. Mr. Edwin Wallaces Outlines of the Philosophy of Aristotle165 is of a different and much less popular character. Originally designed for the use of the authors own pupils, it does for Aristotles entire system what Trendelenburg has done for his logic, and Ritter and Preller for all Greek philosophythat is to say, it brings together the most important texts, and accompanies them with a remarkably lucid and interesting interpretation. Finally we have M. Barthlemy Saint-Hilaires Introduction to his translation of Aristotles Metaphysics, republished in a pocket volume.166 We can safely recommend it to those who wish to acquire a knowledge of the subject with the least possible expenditure of trouble. The style is delightfully simple, and that the author should write from the standpoint of the French spiritualistic school is not altogether a disadvantage, for that school is partly of Aristotelian origin, and its adherents are, therefore, most likely to reproduce the masters theories with sympathetic appreciation.
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