410 



INDEX. 



Toluol and some of its Derivatives, 



Action of Bromine on, 202. 

 Tridax candidissima, 39. 

 Palmeri, 38. 



(Ptilostephium) trifida, var. 

 alboradiata, 39. 



u. 



Universe, Meteoric Constitution of 

 370. 



V. 



Velocity of Solar System through 

 Space, Plan for Measuring, 

 375. 



Verbesina hypoleuca, 37. 

 sororia, 37. 



Vibrations of Circular and Ellipti- 

 cal Plates, 219. 



w. 



Wave Motions, A Xew Method of 

 Studying, 218. 



X. 



Xanthocephalum sericocarpum, 31. 



Z. 



Zaluzania mollissima, 35. 



Zexmenia gnaphalioides, 36. 



Zones of Solar Protuberances, Sup- 

 posed Existence of Two Per- 

 manent, 37U. 



