576 
stant, 32, 133, 268, 477; gaseous, on 
the theory of the, 165. F 
Walker (C. V.} on the difference between 
Leyden discharges and lightning flashes, 
490. 
Warington (R.) on the biniodide of mer- 
cury, 209; on the formation of Prus- 
sian blue upon the surface of gravel, 
322 
OLLe 
Watson (H. H.) on an extraordinary de- 
pression of the barometer, 158. 
INDEX. 
Will (Dr.) on the new method of estima- 
ting nitrogen, 286. 
Winckler (M.) on some compounds. of 
phosphoric acid with oxide of lead, 
OBY . 
Yelloly (Dr. J.), notice of the late, 151. 
Young (Prof. J. R.) on the imaginary roots 
of equations, 186, 252. 
Zea Mays, on the manufacture of sugar 
from, 323. 
END OF THE TWENTY-SECOND VOLUME. 
PRINTED BY RICHARD AND JOHN E. TAYLOR, 
RED LION COURT, FLEET STREET. 
