376 Successful Ascent of the Jungfrau. 



It also appears clear, that the vegetable matter has no imme- 

 diate connection with the living animal tissue ; there is no en- 

 grafting, soldering, prolongation, or implantation of the one 

 into the other. 



In the Muscardine already noticed, or rather the Crjptoga- 

 mia, which constitute that malady, M. Audouin has demon- 

 strated, that the vegetable fibres develope themselves by their 

 radicles, or rather, more accurately, their thallus, which grows 

 at the expense of the greasy tissue of the silk-worm, destroy- 

 ing its globules, and ere long entirely occupying its place, so 

 producing the sudden death of the animal, and the hardening 

 of its body ; whilst, in the singular case now before us, the 

 interposition of an animal substance which is 'not living, ap- 

 pears to be necessary ere the vegetable matter springs up and 

 flourishes. There seem lesser differences in these interesting 

 cases of the method in which vegetable parasites prove de- 

 structive to animal life. Corresponding differences have long 

 been noted in the injury inflicted by animal parasites ; and these 

 hints concerning this wide and most important subject, abun- 

 dantly demonstrate what a wide field lies open for the inves- 

 tigation of the student of nature. 



Notice of Professor Forbes and Agassiz' successful Ascent of the 



Jungfrau. 



Our distinguished and enterprising friend and colleague 

 Professor Forbes, along with Agassiz and others, have made 

 a successful ascent on the great Swiss mountain the Jungfrau, 

 whose summit is 13,720 feet above the level of the sea. Pro- 

 fessor Forbes, being desirous to traverse the vast ice^^Jelds which 

 separate Grindelwald and the Vallais, requested Agassiz, with 

 whom he had been bivouacking for some time amongst the 

 Swiss glaciers, to accompany him across the Ober-Aar glacier 

 (which unites by a Col of 11,000 feet with that of Viesch), and 

 those of Veiscli and Aletsch. To this Agassiz agreed, and pro- 

 posed to add an attempt to ascend the Jungfrau, a proposal 

 which wad readily assented to. 



