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NEW ZEALAND. 



159 



tnic Products from White Island, New Zealand, 



Presented by the Lords of the Admiralty. 



White 



New 



It is 



six miles in circumference. It contains an active volcano 

 and yields considerable quantities of sulphur. The flames 

 issuing from its crater are visible at dusk, while its position 

 is marked during the day-time by a white cloud, which rests 

 upon its summit. — H. W. 13. 



Volcanic bomb, composed of basaltic lava, with 



3 crystals of glassy felspar. 



Scoriaceous basaltic lava, with crystals of auqite 



-felspar, from the summit of Knhihnhr, a « «_ 



121. 



122. 



tinct volcano. 



Wc 



123.— Vesicular basaltic lava, some of the vesicles 

 partly filled with calc spar.— From the central 



White 

 124. 



part of 



Part of a pentagonal column of basaltic L4.va 



five feet in height—From the interior of the crater, bein- 



lava of September, 1831. ° 



125— Basaltic lava, forming the sides of extinct vol- 



canos in the vicinity of Auckland, on the neck of land 



which separates the Frith of Thames from Manukau • 

 assumes a columnar form in some places. 



it 



Most 



y.i J ~ r ~v— «?« io nut, in reality, basaltic 



lava, but a portion of a mud stream, which has been poured 

 out ot the volcano, and subsequently covered by a lava 

 stream, by which it has been baked, while the columnar form 

 nas been caused by its subsequently cooling slowly under 

 pressure. J 



126— Obsidian, with a conchoidal fracture and sharp- 

 cutting edges, and presenting a lamellar structure from the 

 presence of lines of a white powder. There are also a few 



yfelsp 



apparently undergone partial fusion. 



127— Siliceous sinter, Motu-hora. 





Upper 

 Gallery. 



Wall-case 2, 



■ 



