266 
INDEX. 
W. 
Waller (A., M.I).). Microscopic Observations on the so-called Vesicular Vapour of Water, as 
existing in the Vapours of Steam, and in Clouds, &c., 23. 
Water, the decomposition of, into its constituent gases by heat, 1, 17. 
on the so-called Vesicular Vapour of, as existing in the Vapours of Steam, and in Clouds, 
&c., 23. 
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