REPRINT

Governor Calculations, ICS # 2449, published International Correspondence Schools, Scranton, Pennsylvania, 1929. Reprinted by Nation Builder Books, Leesburg, VA, 2005 reprint of 1929 original, 5½ x 8½ photocopied booklet, 66 pages. Please note this is a new photoduplicated reproduction, not an original. This booklet details the theory and design of governors for controlling the speed of steam engines, by regulating the amount of steam admitted to the cylinder. As is usual with most correspondence course booklets by the International Correspondence Schools, this is richly illustrated with crisp line drawings. Contents include: Mechanics of the Governor Types of Governors Pendulum or Flyball Governors The Spring Loaded Governor Isochronism Static and Astatic Governors Coefficient of Speed Variation Fundamental Equation for Stability Shaft Governors Centrifugal Shaft Governor Inertia Shaft Governor Calculations The Flyball Governor Frictional Resistance Sudden Variation of Speed The Shaft Governor Effect of the Location of the Governor Weights The Rites Inertia Governor Design of Balanced Centrifugal Governor Design of the Inertia Governor Examination Questions

Theory of Shrinkage and Forced Fits, Machinery’s Reference Book No. 89, by William Ledyard Cathcart, originally published by The Industrial Press, New York, NY, 1912. Reprinted by Nation Builder Books, Leesburg, VA, 2006. 5½ x 8½ softcover, 39 pages. Please note that this is a PHOTOCOPIED reproduction of the 1912 original. The accompanying images were scanned from a reprint, not the original. In the early 1900s, when highly skilled machinists enjoyed the same status and prestige as computer programmers do today, Machinery magazine was essential reading for any industrial executive. Industrial Press, the publisher, approached the most erudite master machinists they could find to write a series of booklets on various specific aspects of machining and manufacturing operations. These booklets were jam-packed with the practical knowledge, hard-earned know-how, and “shop kinks” learned over the lifetime of the foremost machinists in the world. In 1914, these booklets were consolidated into the first edition of Machinery’s Handbook, which has remained the world’s premier handbook for the metalworking trades for nearly a century. A first edition of Machinery’s Handbook sold on Ebay in May 2002 for over $200. Another first edition sold in December 2002 for over $300. Until now, many of the booklets that were published as part of the series that was the origin of Machinery’s Handbook were almost as rare. Nation Builder Books is proud to begin reproducing a number of these previously rare booklets nearly a century later. The contents are: Introduction Preliminary Considerations Stress—Deformation—Lateral Contraction Elastic Limit—Modulus of Elasticity Shrinkage Stresses – Approximate Method (Tires) Duration and Application of Lame’s Formulas Application of Lame’s Formulas to Compound Cylinders Outer Cylinder Inner Cylinder, Hollow Formulas for Stresses in the Hub Resistance of Hub to Bursting Load Effect of Thickness of Hub on Resistance to Slip Formulas for Stresses in the Shaft Effect of Lateral Contraction Resistance to Slip Shrinkage Allowances Calculating Shrinkage Fits Examples Shrinkage Temperatures Practical Considerations Cylindrical and Tapered Fits Difference Between Forced and Shrinkage Fits Forcing Pressure Applications in Practice From the first page: A shrinkage fit is a cylindrical or slightly conical joint between two machine members, as a crank-web and a shaft, in which the bore of the outer member or crank is smaller than the diameter of the inner member or shaft, so that the outer member must be expanded by heat before It can be set in place, while, in the subsequent cooling, it contracts and grips the inner member with a force which depends on the character of the metals, on the thickness of the outer member, and on the difference between the original diameter of the bore and that of the inner member. This difference is called the allowance for shrinkage. A forced fit is based on the same principle and is virtually of the same character, except that the parts are forced together when cold by hydraulic or other pressure. These fits have a wide range of application, extending from small machine parts to built-up crank-shafts for heavy engines and the massive forgings for high-powered guns.

Cupola Practice, ICS # 1705, published International Correspondence Schools, Scranton, Pennsylvania, 1921. Reprinted by Nation Builder Books, Mebane, NC, 2017, 5½ x 8½ photocopied booklet, 54 pages. Please note this is a new photoduplicated reproduction, not an original. As is usual with most correspondence course booklets by the International Correspondence Schools, this is richly illustrated with crisp line drawings. Contents include:  Construction and Care of Cupolas Introduction Furnaces for Melting Iron Operating a Cupola Construction of Cupolas Form and Dimensions Wind Belt Construction of the Charging Door Tuyeres   Height of Tuyeres  Height of Slag Hole  Long Heats in a Cupola Upper Tuyeres Center Tuyeres  Lining Cupolas Laying the Bricks Single and Double Lining Forms of Bricks for Linings Refractories for Cupola Linings Causes of Destruction of Linings Drying the Lining Starting Fire for Drying Cupola Lining Treatment of Lining Before First Heat Cleaning the Cupola Dropping Bottom First Operation in Cleaning a Cupola Bunged Cupolas Melting Zone of a Cupola Position of Melting Zone Repairing the Lining at the Melting Zone Daubing a Cupola General Method Mixing Materials for Daubing Cupola Bottoms Bottom Props Foundation for Props Quality of Material Used in Bottoms Preparing the Sand for Cupola Bottoms Density and Slope of a Sand Bottom Making Breast, Tap, Hole and Spout Dimensions Materials Used in Making the Breast  Use of Clay Cores for Tap Holes Cupola Operation Starting a Heat Starting the Fire in a Cupola Charging the Fuel in a Cupola Use of Blast Depth of Fuel Bed Regulation of Charges Size and Proportions of Charges Weight of Metal and Fuel Charges Melting Ratio Economy of Fuel in Melting Iron Ratio of Weights of Iron and Fuel Charging Cupolas Methods for Charging Heavy and Light Irons Charging Different Grades of Iron Irregular Charging Slagging a Cupola and Fluxes Used Principle of Fluxes Kinds of Fluxes Quantity of Flux Necessity of a Free Slag Fuel Combustion in Cupolas The Blast Combustion Pressure and Volume of Blast Cupola Blowers  Blast Gauges Tapping Out a Cupola Precautions Necessary in Tapping Tools for Tapping Method of Tapping Stopping a Cupola Tools for Stopping Stopping a Cupola Before and After Tapping Materials for Stopping a Cupola Fuels for the Cupola Coal and Coke Manufacture of Coke Analysis and Specifications for Coke Melting Iron in Small Cupolas Construction of Small Cupolas Cupolas for Experimental Work Cupola Breakdowns Examination Questions