J PREFACE WHILE there is little a foundryman needs to know which has not been fully treated by competent authorities, there is not, so far as I am aware, any summary of this great mass of publications. In a foundry experience covering many years, I have frequently spent hours at a time in searching for special information. Believing, therefore, that a compilation of this matter, with authoritative instruction for the solution of the many problems which are continually presented in the foundry, all properly arranged for ready reference, would receive a favorable reception, an attempt has been made to meet this need by the production of this book. The material for the Manual has been drawn from every available source. The proceedings of the American Foundrymen's Association have furnished no end of information. The publications of Professors Turner, Porter, Reis, Dr. Moldenke, Messrs. Keep, Longmuir, Outerbridge, West and others have been most carefully searched. Much has been taken from "The Foundry," "Castings" and "Iron Age." A great many of the "Foundry" records are given in full. Possibly, in some cases, special credit for extracts has not been accorded; for such omissions indulgence is asked, as there has been no intentional neglect or lack of courtesy. 73 In the selection of the material for the book, proper consideration has been taken of beginners and others who may have not gotten very far in their acquisition of foundry information. For such men, it is also hoped the book will be of good service. As regards the price lists and discounts which are given in connection with many foundry supplies, it should be stated that these are not quoted as current prices. They are offered simply as furnishing a guide to close approximation of costs. The matter for the preliminary portion of the book relating to elementary Mathematics, Mechanics, etc., has been taken in large part from such authorities as Rankine, Bartlett, Wentworth, Trautwine, Kent, Jones and Laughlin, Carnegie Steel Co., and the Encyclopedia Britannica. New York, Jan., 1917. D. W. P. Ratio and Proportion, 1. Root of Numbers, 3. Percentage, 5. Algebra, 7. Equations, II. Plane Geometry, 15. The Commercial Weights and Measures, 36. Metric Weights and Page NATURAL SINES, TANGENTS, ETC.... Solution of the Right-angled Triangle, 109. Solution of Ob- lique-angled Triangles, 109. Tables of Sines, Tangents and Wire and Sheet Metal Gauges, 119. Weights of Iron and Steel, 122. Cold-rolled Steel Shafting, 140. Galvanized and Corrugated Sheet Iron, 141. Sheet Tin, 142. Copper and Brass, 143. Metal Fillets, 145. Iron Wire, 146. Nails and Tacks, 148. Threads, 149. Bolts, Nuts and Washers, 150. Set Screws, 160. Turnbuckles, 162. Cotters, 164. Thumb- screws, 165. Rivets, 166. Iron Pipe, 167. Tin and Zinc, 169. Lead Pipe, 171. Chains and Cables, 173. Sprocket- wheels, 176. Modulus of Elasticity, 181. Deflections, 184. |