INDEX. 



Vegetables, fecula of, 81, 182 



Vcetables, generative organs of, 214 



Vibration, modes of equalizing the arcs 

 of, 51 



Vince, Professor, remarks on the re- 

 view of his essay on gravitation, 3U5 



Volcanic substances, 298, 299 



Volta, 279, tt seq. 



Von Ruprecht, Von, see lluprecht 



W. 



Walker, Mr. W. on the disadvantage 

 of jewelled holes in clock-work, 236 



Ward, Mr. H. his description of a com- 

 pensation pendulum, for a clock or 

 time-piece, with experiments, 53 



Watch escapement, anew, 178 



Werner, M. 191 



Wernerian Scientific Society, 237, 383 



Westrurab, 14 



Wheat, spring, 1j5 



Whittle, Capt. 249 



Wilson, Mr, C. his description of a se- 

 cure sailing or life boat, 124 



Windlass, an improved, 133 



W. N, in answer to Dr. Traill's letter 

 on the use of mercury in air pumps 

 for exhaustion, 66 — Cn the existence 

 of metals in alkalies, C8, 231,363— 

 In reply to Mr. Cook, 297 



Wollaston, Dr. on super acid and sub- 

 acid salts, 164 



Woodhouse, James, Esq. his account 

 of an experiment, in which potash 

 calcined with charcoal, took fire on 

 the addition of water, and ammoni- 

 acal gas was produced, 290 



Zinc ore, its uses as a paint, 12 



END OF IHE TVVENTy-FIRST YOLUJIE. 



Stratford, Printer, Crown-Court, Temple-Bar. 



