436 Mr. Mallet on the Construction of Artillery. 



NOTES. SECTIONS. PAGE. 



P, 190 Cast-steel guns; Krupp's, 374 



Q, 206,214 Wrought-iron guns; Princeton; Gospel Oak; Mersey Steel Company, . . 377 



E, 214 Great forgings; effects of long heating and hammering; refers to Note Q, . 391 



S, 265 Physical constants of the materials for gun-founding, 392 



T, 26G Field batteries of wrought- iron guns, 397 



U, 270 American methods of proving musket barrels by water presiire, .... 399 



V, 271 Field-guns of rolled iron; refers to Note T, 399 



"W, 282 Dr. Hart's investigation 399 



X, 286 Radial joints; built-up guns; refers to Notes K and W, 407 



Y, 289 Shrinking-on heated rings ; refers to Note W, 407 



Z, 305 American Reports on wrought-iron guns, 407 



AA, 305 Large forgings ; diflSculties; refers to Note Q, 417 



BB, 305 Advantages of wrought-iron guns; refers to Note T, 417 



CC, 316 Effects of heating in service on built-up guns; refers to Note W, .... 417 



DD, 318 Further researches needed ; refers to Note S, 417 



EE, 320 List of German authors, 418 



PLATES. 



PLATE. 



I. Directions of fracture in burst cast-iron guns, To face 146 



II. Molecular construction of metals, 150 



III. Effects of form and mass on castings, 162 



IV. Drooping at the muzzle in bronze guns, 185 



V. Molecular forms of cast and wrought-iron, 369 



VI. Change of structure in wrought-iron, cold, 259 



VII. Great bombard of Ghent; Bombard on bed 319 



VIII. Mons Meg, Edinburgh Castle, external elevation and longitudinal section; Bhurt- 



pore bronze gun, 321 



IX. Great wrought-iron gun of Moorshedabad, 324 



DIAGRAMS. 



Curved form of fracture in guns, 146 



Longitudinal and transverse section of gun, with red-hot shot lodged within it, .... 175 



Vertical and ascending currents around heated guns, 177 



Curvature produced by change of temperature in guns, 186 



Quadrature of the curves indicating the values of T, and 1\ for cast-steel and wrought-iron, 213 



Diagram showing the comparative ductility of cast-iron, 216 



Effect of stroke of shot on thick plate of iron, 265 



Gun without trunnions, 274 



Direction of forces in the explosion of gunpowder within the cylinder of gun, 283 



Section of gun formed of separate, closely fitting, concentric cylinders, 287 



Section of a gun formed of a cylinder of equal voussoirs, &c 288 



Cast-steel 8-inch gun, 375 



Effects of fracture in gun exploded in the United States Frigate, Princeton, 481 



