REPORT ON MIXKRAX AND THERMAL WATERS. 79 



nish of my own opinion of its merits is, that I conceived it to 

 have superseded the demand for a distinct woi'k on the subject, 

 which I had for several previous years been preparing. 



Indeed I have been induced in some measure to modify the 

 nature of this Report in consequence, having endeavoured to be 

 most full on those points, which had been passed over by Dr. 

 Gairdner, and in other instances supplying rather a comment 

 upon the facts he had collected, than a mere recapitulation of 

 their substance. 



Appendix to Page 42. 



When mentioning the reported presence of oxygen in thermal 

 waters, I ought to have added, that Fodere, Voifages aux Alpes 

 maritimes, states, that this gas was extracted, by boiling, from 

 the water of Roccabigliera in Piedmont, in such quantities, and 

 of such purity, as led him to believe, that a portion of deutoxide 

 of hydrogen must have been present to occasion it. But so 

 extraordinary a fact in the history of thermal waters, as this 

 would be, requires further confirmation. 



