CONTENTS. 



Vll 



52- 

 53- 

 54- 

 55- 

 56. 

 57- 

 58. 

 59- 

 60. 

 61. 

 62. 



^3- 



64. 

 65. 

 66. 

 67. 

 68. 

 69. 

 70. 



71- 



72. 



73- 

 74- 



75- 

 76. 



77- 

 78. 



79- 

 80. 

 81. 

 82. 



83- 

 84. 



85. 

 86. 

 87. 

 88. 

 89. 

 90. 

 91. 

 92. 



93- 



94. 



95- 

 96. 



Compressibility of air and oxygen between 18° and 22°C 



Relation between pressure, temperature and volume of sulphur dioxide 



" " " " " " " ammonia 



Compressibility of liquids 



" " solids 



Specific gravities corresponding to the Baumd scale 

 Reduction of weighings in air to vacuo 



" densities " " " " 

 Densities of the solid and liquid elements 



" " various woods . 



" " " solids . 

 " " alloys . 



" " " natural and artificial minerals 



" " molten tin and tin-lead eutectic 

 Weight in grams per square meter of sheet metal 



" " various common units of sheet metal . 

 Densities of various liquids 



" " '* gases ....... 



" '« " aqueous solutions of salts, bases and acids 

 Density of water free from air between 0° and 36° C . 

 Volume of water at temperatures between 0° and 36° C in terms of its 



volume at the temperature of maximum density . . . . 

 Density and volume of water at different temperatures from-io to 25o°C 



" " " " mercury at " " " -10 " 36o°C 



Densities aqueous ethyl alcohol. Temp, variation . . . . 



" " mixtures methyl alcohol, cane-sugar or sulphuric acid 



Velocity of sound in solids . 



'* " " " liquids and gases . 

 Musical scales 



Acceleration of gravity at sea level and different latitudes . 



Results of some of the more recent gravity determinations . 



Value of gravity at some of the U. S. C. and G. Survey stations 



Length of seconds pendulum for sea level and different latitudes 



Determinations of the length of the seconds pendulum 



Miscellaneous geodetic data 



Lengths of degrees on earth's surface 



Miscellaneous astronomical data . 



Planetary data .... 



Equation of time .... 



Miscellaneous astronomical data . 



Terrestrial magnetism : secular change of declination 



" " dip or inclination . 



" " secular change of dip 



" ** horizontal intensity 



«* " secular change of horizontal intensity 



77 



78 

 78 



79 

 80 

 81 

 82 

 82 

 83 



85 

 86 



87 

 88 

 88 

 89 

 89 

 90 



91 

 92 



94 



95 

 96 



97 



98 



100 



lOI 



102 

 103 

 103 

 104 



105 

 106 

 107 

 107 

 108 

 108 

 109 

 no 

 no 

 no 

 III 

 113 

 113 

 114 

 114 



