CONTENTS. Vii 



40. Volume of glass vessel from weight of its volume of H 2 O or Hg . ... 72 



41. Reductions of weighings in air to vacuo 73 



42. Reductions of densities in air to vacuo 73 



MECHANICAL PROPERTIES 



43. Introduction and definitions 74 



44. Ferrous metals and alloys: Iron and iron alloys 75 



45. " " " carbon steels 76 



46. " " " " heat treatments 76 



47 . " " " " alloy steels 77 



48. " steel wire, specification values 78 



49. " " " " . " experimental values 78 



50. " " " " semi-steel 78 



51. steel wire rope, specification values ... 79 



52. " plow-steel rope, " .... 79 



53. steel wire rope, experimental values ... 79 



54. Aluminum, miscellaneous 80 



55. Aluminum: (a) sheet, experimental values 80 



(b) " specification values 81 



56. Aluminum alloys 81 



57. Copper: miscellaneous experimental values 82 



58. rolled, experimental values 82 



59. wire, specification values, hard-drawn 82 



60. " " medium hard-drawn 83 



61. " " soft or annealed 83 



62. plates 83 



63. Copper alloys: nomenclature 83 



64. " copper-zinc alloys or brasses 84 



" copper-tin " " bronzes 84 



65. " " three or more metals 85 



66. Miscellaneous alloys 88 



67. metals: tungsten; zinc; white metal 89 



68. Cement and concrete : (a) cement 90 



" " " (b) cement and cement mortars 90 



(c) concrete 91 



69. Stone and clay products: (a) American building stones 92 



" " " " (b} Bavarian building stones 92 



" " " " (c) American building bricks 93 



" " " (d) brick piers, terra-cot ta piers 93 



" (e) various bricks 93 



70. (a) Sheet rubber 94 



(b) Leather belting 94 



71. Manilla rope 95 



72. Woods: hardwoods, metric units 96 



73. " conifers, metric units 97 



