392 Transactions. — Geologij. 



to me satisfactory is to suppose that two eruptions took place 

 at Te Mari, during the first of which water and sand were 

 thrown out, the wind being at the time from the south-west. 

 This was followed by a second explosion, when pumice was 

 ejected, the wind at the time being from the opposite quarter 

 of the compass. The event is an important one, because it 

 suggests a new period of volcanic activity in the district. 

 Whether Te Mari will become more active than it now is re- 

 mains to be seen. It may be that the late eruptions represent 

 the solfatara condition in the history of the Tongariro Moun- 

 tain, but the expulsion of pumice is usually looked upon as the 

 prelude to volcanic activity rather than as the termination of 

 it. We know that these mountains must have thrown out vast 

 quantities of pumice in some period of their history, as a basin 

 a hundred miles long and sixty broad is mostly filled with it, 

 and the slope of that basin is from the Tongariro Eange. Our 

 knowledge of volcanic phenomena does not allows of a predic- 

 tion, and time alone will ena.ble us to determine whether Te 

 Mari is beginning or ending a career of volcanic activity. 



Addendum. — I find that weak muriatic acid, if sprinkled 

 over green leaves, destroys the green colouring-matter. Other 

 acids will no doubt act in a similar way. It may be inferred, 

 therefore, that water strongly impregnated with acid was 

 thrown from Te Mari during the eruption, and that the leaves 

 on the trees were destroyed in this way. 



Art. XLIV. — Notes on the Geology of the Country bcticeen 

 Dannevirke and Wainui, Haivke's Bay. 



By H. Hill, F.G.S. 



\_Eead before the Hawke's Bay Fhilosopliical Institute, 13th June, ISOS.] 



The formation of a new road between Wainui, near Cape 

 Turnagain, and Dannevirke, in the Seventy-mile Bush, is of 

 much interest from a geological standpoint. The road runs 

 in a north-west and south-east direction, and passes over the 

 Puketoi limestone range at a point where the rocks are much 

 fractured, or where they are so denuded as to show but small 

 remnants or outlines. The distance between Wainui and 

 Dannevirke is about forty-six miles, and from the latter town 

 to the Euahine Mountains the distance is about ten miles, so 

 that a complete section is now obtainable of all exposed rocks 

 from the Euahine to the coast between the 40th and 41st 

 parallels of south latitude. The road in question passes 



