TBANSACTIONS OF SECTION C. 



161 



The lines were re-ranged on the 7th January, 1891 ; and the 

 measurements of the latter disclose that at two points only, 

 one mile and a quarter apart, the Tasman Glacier is travelling 

 at the rate of 130ft. per annum faster than at the lower point : 

 thus showing that, as there is no very great difference in the 

 width of the Tasman Glacier at this point, the greater velocity 

 obtained must be owing to the difference in the declivity of the 

 beds on which they move. 



The survey of this glacier is still in progress ; and Mr. 

 Brodrick, in sending down particulars of the measurements 

 taken, remarks : "In the imperfect state of the survey of this 

 glacier it is perhaps better not to try to describe it ; so I will 

 only remark that the widening-out of the glacier into the 

 Murchison valley is very ancient ; the lateral moraine there is 

 covered with grass and scrub, and the glacier seems inclined to 

 break through the lateral moraine along its western side in 

 several places." 



The information at our disposal, therefore, shows the fol- 

 lowing are the average rates at the time of year when the 

 observations were made at which the several glaciers were 

 moving at the places where they were measured : — 



The Hooker, at the rate of 131ft. Sin. per annum. 



The Murchison, „ 149ft. lin. 



The Mueller, „ 203ft. Oin. 



(At Ball Glacier, 340ft. per annum. 



I At Malte Brun Spur, 470ft. 



I have not attempted to draw any conclusions from these 

 figures, for, as I have previously explained, I did not have 

 them made for the purpose of examining the glacier motion 

 myself, but in order that reliable data should be available for 

 any geologist or scientific observer who may wish to study the 

 motion of the New Zealand glaciers ; and to any gentleman 

 desiring to do so I shall be happy at any time to supply the 

 measurements made, and all other data that have been recorded 

 11- 



The Tasman, 



