4.06 INDEX. 



Vince (Professor) opinions of, to account for the apparent changes 

 of place, colour, size, and figure, of the heavenly bodies, 14 

 —observations thereon, 15 — ^theory to account for such 

 changes, 16-25. 



Violets, test infusion for, 456. 



Vitality of plants, singular instance of, 468, 469. 



Volcanoes of Tartary, notice of, 197. 



Water, on the compressibility of, 399. 



Weeds, growth of, successfully prevented or destroyed by salt, 



70,71. 

 Whale torpedoes, notice of, 449. 

 Wheat, remedy for mildew in, 446. 

 White in paintings, process for restoring, 168, 169. 

 Wilkinson (Mr. Samuel), evidence of, in the cause of Severn and 



Co. against the Imperial Insurance Company, 337, 338 — 



observations thereon, 339, 340. 

 Wilson (Mr. Daniel), evidence of (with remarks), in the same 



cause, 321-324. 

 Wodanium, analysis of, 456. 

 Wollaston (Dr.) measurement of Snowdon by, 397 — on sounds 



inaudible by certain ears, 398, 399. 

 Wood buried in the ground, effects of time on, 455. 

 Worms, effectually destroyed by using common salt as a manure, 



68, 69 — esculent plants or fruit-trees rendered unfit for their 



habitation by salt, 63-68. 

 Writing (secret), requisites of, 89 — of the Spartans, 90 — ob- 

 servations on Lord Bacon's rules for, 90, 91 — new system 



of, proposed, with remarks, 91-101. 



Yeast, used as a manure, 446. 



Yew-tree berries, a protection of fruit from wasps, 448. 



Zea (Don Francisco Antonio) on the culture of the Arracacha, 



27 — on a species of Indian corn raised in France, 27, 28. 

 Zirconia, process for procuring, 183. 



2 £eiiatum.— In the Table of Contents of Number XIX. Article V. for 

 Agriculture read Horticulture. 



