INDEX II. 



283 



Voelcker (Professor) on combinations of 

 earthy phosphates with alkalies, 88. 



Volcanic eruptions and earthquakes in 

 China and Japan, on certain pheno- 

 mena attendant on, 115. 



Walker (J. J.) on the iris seen on the 

 surface of water, 29. 



Wallace (W.) on the equivalent of bro- 

 mine, 88 ; on proposed improvements 

 in the manufacture of kelp, ib. 



Water: — on the transmission of electricity 

 through, 13; on the iris seen on the 

 surface of, 29 ; on the composition of 

 Thames, 75 ; on the supply and puri- 

 fication of, 83 ; on distilled, 256. 



Water-supply afforded by a spring at 

 Ashey Down, on the, 114. 



Wave-lengths, on the law of the, corre- 

 sponding to certain points in the solar 

 spectrum, 20. 



Waves, on the propagation of, 9 ; atmo- 

 spheric, 50. 



Wealden, on the supposed, n ear Elgi n, 264. 



White Nile, exploration of the, 265. 



Willich (C. M.) on the angles of dock- 

 gates and the cells of bees, 10. 



Wilson (A. S. S.) on a system of moving 

 bodies, 43. 



Wilson (Prof. G.) on some of the stages 

 which led to the invention of the modern 



air-pump, 89 ; on the employment of 

 the electrical eel, Gymnotas electricus, 

 as a medical shock-machine, by tlie na- 

 tives of Surinam, 158; on the statistics 

 of colour-blindness, 228. 



Wolverhampton waterworks, on an arte- 

 sian well in the new red sandstone at 

 the, 229. 



Wombat, on the skull of a, from the bone- 

 caves of Australia, 152. 



Wood (E. A.) on a mode for suspending, 

 disconnecting and hoisting boats at- 

 tached to sailing ships and steamers 

 at sea, 245. 



Wren's (Sir Christopher) cipher, contain- 

 ing three methods of finding the lon- 

 gitude, 34. 



Wyllie (J.) on some old red sandstone 

 fossils, 126. 



Yang-tse-kiang, on the, and its future 



commerce, 196. 

 Yates (Mr. J.) on cycadaceous plants 



grown in England, 142. 



Zanzibar, on the commercial resources of, 



266. 

 Zoology, 126, 142,265. 

 Zoophyte, on a new, 142. 

 Zoophytes of Caithness, on the, 155. 



