364 Transactions, — Oeology. 



at noon 3 inches, and remained so all day, falling on the night 

 of the 10th 5 inches ; since when the oscillation has been 

 continuous, but to no very great extent. The temperature of 

 Eachel's Spring at the Sanatorium on the 11th June was 170°, 

 and from that date to 1st July it gradually rose to 196°, with a 

 greater flow than before. For these exact data we are indebted 

 to Mr. Boscawen, who obtained them from Mr. Hall, the 

 Observer. 



In the far north of the central zone, at White Island, it 

 was reported by the s.s. " Jane Douglas " that the crater was 

 showing unusual signs of activity at 9 p.m. on the 13th, whilst 

 the "Hinemoa" reported it to be iu its usual state on the 14th. 

 Te Puke settlers saw a "violent eruption of steam on the 

 morning of the 10th." The " Te Anau" reported that nothing 

 but an unusual amount of steam was rising on the 13th. On 

 the 14th, vast columns of steam were reported as being seen all 

 day from Tauranga, and the same on the 15th. At Wairakei, 

 near Taupo, the springs and geysers are reported to be "in an 

 extraordinary state of activity" on the 10th. We may add that 

 we saw much more steam than usual arising from the large 

 group of springs south of Maungakakaramea on the 14th ; but 

 these being in the direct line of the great fissure, it is only 

 natural to expect this. 



Taken altogether, then, this group of authenticated facts 

 goes to prove that the disturbance was felt all along the 

 central line of activity of the central zone, from extreme north 

 to south, as well as on its flanks. 



Descnption of the Points of Eruption. 



We will commence our description of the efi"ects of the erup- 

 tion, as seen by ourselves on the 13th, 14th, 15th, 16th of June, 

 by commencing at the southern end, near Lake Okaro, and 

 tracing it thence northwards to the Wahanga Mountain, the 

 most northerly point of eruption. This line, or irregular (and 

 sometimes hidden) fissure, is about 8-^ miles long, running in a 

 general north-easterly direction, and along it can be traced a 

 series of craters and points of eruption almost, though not 

 quite, continuous. 



Appearance of the District, approaching from the South. 



Emerging fi-om the bush called Pareheru, wliich the track 

 approaching Rotomahana traverses, the scene is wonderfully 

 striking. The whole country is clothed in a pale grey mantle. 

 Hill and dale, level and steep, all is of the same hue. In the 

 far distance, as in the near foreground, nothing has escaped this 

 ashen covering save the Okaro Lake, which lies before us 



