INDEX. 
405 
l 
U. 
Underground Temperature at Oxford (Rambatit), 235. 
V. 
Vaccination, effectiveness of, quantitatively measured (Pearson), 1. 
Vibrator, effect of natural light on (G-oderey), 329. 
Z. 
Zelbny (John). The Velocity of the Ions produced in Gases by Rontgen Rays, 193. 
ERRATUM. 
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-7 OCT. 190i 
HARRISON AND SONS, PRINTERS IN ORDINARY TO HER MAJESTY, ST. MABTIIS’S DANE, LONDON, W.C. 
