53 



Natica pajjyracea Bush., XXI., Ai^t. 2, 19. 



Neœra gouldiana Hinds, XXL, Art. 2, 39. 



Nectaries, extrannptical, studies on some, XXIIl., Art, 3, 1-28. 



Neoschioagenna, XXI., Ait. 5, 3. 



Neptunea despecta Linné, XXI., Xii. 2, 7. 



Neuropteris ßexuosa Sternb., XXIIL, Aii. 8, 9. 



sckertcJizeri Hoffm., XXIIL, Ai*t. 8, 10. 



New element, allied to molybdenum, XXV., Ait. 16, 1 ; , in tliorianite, 



XXV., Alt. 15, 1. 



Newton's ring modified by a mica film, V., 193-196. 



Niclitstationäre Wirbelbildungen in der Erdatmosphäre, VIL, 360. 



Nickel, combined effects of torsion and longitudinal stress on the magnetiza- 

 tion of, IL, 283-303 ; , electrical resistance of, at high temperatures, L, 



325-328 ; Avire, on the magnetization and retenti veness of, under 



combined torsional and longitudinal stresses, IL, 30J:-320. 



Nickel steels, magnetization and magnetostriction of, containing different per- 

 centages of nickel, XIX., Aii. 11, 1-13. 



Nicobar group, the geologic structure of, XL, 81. 



Nihsonio, inouyei Yok., XX., Ai-t. 5, 9. 



johnstrupi Heer, VIL, 226. 



nipponensis Yok., III., 42. 



orientalis Heer, III., 41 ; XX., Art. 8, 13. 



ozoana Yok., III., 11. 



pterophylloides, VIL, 228. 



schaumhurgensis Dunker, VIL, 227. 



Nipponium, Np, a new element in thorianite, XXV., Ai-t. 15, 1. 



Nipponites inirahilis Yabe, XX., 2, 20. 



Nitiic oxide, absorption of, in gas analysis, IX., 9 ; , Ewart Johnstone's 



way to prepare, VIL, 253-254; , interaction of, with silver nitrate, 



IX., 11-13. 

 Nitric peroxide, constitution of, XIX., Art. 17, 1-5. 

 Nitrilosulphoiiates, XVIL, Art. 2, 1-9. 

 Nitrite, compounds of, witli liydroximidosulphates, XIIL, 211. 



