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116 



INDEX. 



Globes, capacity of, method of determining, 2. 

 table of results, 12, 76. 

 hydrostatic weighing, 6, 9. 

 change of surface of, 45. 



compression when exhausted, mode of determining^ m 



results, 10. 

 " den.sity of material, 11. 

 " desiccators for, 35. 

 " filling with hydrogen, 57, 62. 



" ^^ith oxygen, 18, 36, 51. 

 '■ hydrostatic weighing, 6, 9. 



preliminary weighing, 3. 

 " solid contents of, 11. 

 Gravity, determination of, at Cleveland, 27. 



Hydrogen and oxygen, ratio of atomic weights, 109, no, 114. 

 density of, results, 60, 63. 



by new method, apparatus for, 66, -j-j. 

 results, 74, 80. 

 preparation of, 57, 61. 

 purity of, method of determining, 57. 

 transfer of, without using stopcocks, 71. 



Leakage of stopcocks, prevention of, 47, 66, 98. 



Mano-barometer, 22. 



Manometer, differential, 33. 



Mercury, and glass, leakage of air between, 89. 



oxidation of, in eudiometer, 89. 

 Microscopes, reading, 23. 



Nitrogen, amount of, found in hydrogen, 59. 



Oxygen and hydrogen, ratio of atomic weights, 109. 1 10, 1 14. 



density of, results, 32, 50, 55. ' f 



preparation of, 19, 52, 96. ■ 



" purity of, 21. \ 



weighing of, for syntheses, 96. 



Palladium, charging with hydrogen, 70. 



hydrostatic weighing of, 70, 98, 99. 

 " weighing, 71. 



Phosphorus pentoxide, behavior of, towards oxygen, 107. 



drying power, 21, io6. 

 Preparation of hydrogen, 57, 61. 



of oxygen, 19, 52. 

 Pressure, measurement of, 22, 33, 53, 62, 72, 86. 

 Purity of hydrogen, 57. 

 " of oxygen, 21. 



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