142 Mr Conybeare on the former Temperature of' 



On the 9th, they crossed the summits of the Viescherhorn, 

 then descended again upon the glacier of Aletsch, and slept be- 

 hind some rocks which have fallen from the Twisteraarhorn, 

 having the Monch to the right- 



On the 10th, still turning to the right, they scaled-and fol- 

 lowed the ridge which descends from the Jungfrau towards the 

 Breithorn. There they found several wide crevices, which they 

 crossed with the assistance of a ladder. The ice was so steep in 

 this place that they were obliged to cut steps in it for two hourg. 

 At leno-th, about four o'clock, they arrived on the plane of the 

 highest summit, and in half an hour more had ascended the small 

 conical rock which crowns it. There they planted their flag, to 

 the depth of two feet, in the ice, where it was still seen several 

 days after from the village of Interlaken. 



The same evening they returned to sleep at the rocks of the 

 Finsteraarhorn, on the glacier of Aletsch, and on the 11th, at 

 noon, returned to Grindelwald. 



The temperature of the summit was pretty mild. The view 

 from the summit was very extensive, as the Jungfrau is only 

 overtopped by the Finsteraarhorn near it, and by some of the 

 summits of the Alps of the Vallais and of Savoy. 



It is to Mr Rohrdorf of Zurich, who has resided for several 

 years at Berne, that we owe the execution of this project, which 

 had often been undertaken, and as often abandoned, on account 

 of the extreme difficulties which it presented. A detailed ac- 

 count of the enterprlze ought to be transmitted to the Govern- 

 ment *. 



Answer to Dr Fleming's View of the Evidence from the Animal 

 Kingdom, as to the former temperature of the Northern Re- 

 gions. By W. D. Conybeare, Escj^. F. K. S., M. G. S. 

 &c. (Communicated by the Author.) m-v: iSi 



^ViTH every feeling of respect for your correspondent Dr Fle- 

 mino-, as a diligent and meritorious compiler in natural history, 

 I trust I may be well excused in exercising the same liberty of 

 dissent from his opinions which he himself so liberally assumes 

 • Bibliotheque Universelle, October 18?8. . 



