Prof. Hare's improved Eudiometrical Apparatus. 129 



ing to Dr. Thomson's plan of taking 42 per cent of hydrogen. 

 The only way of mixing the gases by a volumeter, in such a 



ratio, would be to take the full of the volumeter, 21 times of 

 New Series. Vol. 4. No. 20. Aug. 1828. S hydro- 



