DE. JOULE ON SOME THEEMO-DTNAMIC PEOPEETIES OF SOLIDS. 
131 
INDEX. 
Capillary attraction, decrease of, by beat, causes contraction of tbe linear dimensions of wet wood, 77, 78. 
Cast iron and steel, extensive range of thermo-electric intensities in varieties of, 13-15. 
Compression, thermal effects of, in iron, 94-99 ; cast iron, 100-103 ; copper, 104-106 ; lead, 107 ; glass, 108 ; 
wood, 109-113 ; vulcanized india-rubber, 114-117. 
Elastic fluids, four hypothetical views concerning, 1. 
Elasticity of india-rubber increased by heat, 33-38 ; of wood and metals decreased by heat, 66, 120 ; per- 
fect in no case, 121. 
Expcmsion hy heat of gutta percha, 32 ; of vulcanized india-rubber, 44 ; of wood, 60-81. 
Gutta per cha, specific heat of, 32 ; expansion by heat, 32. 
India-ruhler, physical properties of, 33, 34 ; its elasticity increased by heat, 38, 50, 116 ; vulcanized ditto, 
its expansion by heat, 44 ; its specific heat, 43 ; its specific gravity diminished by stretching, 45. 
Leather, expansion of, by heat, 82 ; elasticity of, 82. 
Paper, expansion by heat of, 82. 
Ratan cane, expansion of, by heat, 79 ; elasticity of, 79. 
Set, of materials, taken out by heat, 38, 55, 56, 65, 76, 84, 118 ; peculiar effects of, 67, 85. 
Specifle gravity of wood, 72, 74. 
Specifle heat of cast iron, 26 ; gutta percha, 32 ; vulcanized india-rubber, 48 ; wood, 87. 
Spring, thermal effects of compressing or extending spiral, 1, 2-5, 122-125. 
Tension, thermal effects of, in iron, 20-24; steel, 25; cast iron, 26; copper, 28; lead, 30; gutta percha, 31; 
india-rubber, 35, 41 ; vulcanized ditto, 46-52, 57, 58 ; wood, 86-92. 
Thermo-electric intensities, table of, 16. 
Thermo-multiplier, vacuum, 6-12, 
Time required by all substances to assume a new dimension, 39, 85, 121. 
Whalebone, expansion by heat of, 82 ; properties of, 84 ; elasticity of, at different temperatures, 85. 
Wood, its linear expansion or contraction by heat, 60-81 ; its expansion by heat increased by tension, 63, 
75 ; its elasticity decreased by heat, 66, 68 ; its expansion by heat decreased by moisture, 69-81 ; its 
specific gravity, 72, 74 ; its specific heat, 87 ; its expansion by heat considered apart from the water in 
its pores, 77. 
