77 6 INDEX. 



PAGE 



Vesuvius, Threatened Outbreak of 378 



Vision, Peculiarities of 510 



Vogt, Carl, Personal Reminiscences of some Deceased Savants 20 



Voluntary Motion 444 



Water-Courses, Subterranean 124 



Water for Domestic Uses 759 



Water-Supply of Rivers 288 



Water- Waves and Sound-Waves. (Illustrated.) 166 



West, Charles, Logic of Probabilities 236 







Yellow Fever 714 



Yellow Fever, and what to do about it 747 



Yellow Fever, Artificial Cold in the Treatment of 763 



END OP VOL. XIII. 



