APPENDIX /?. 257 



names of all the assistants. Daniel Dollfus-Ausset has since pub- 

 lished the picture in his Atlas of the " Materiaux pour 1'etude des 

 glaciers" ; and, at my suggestion, a small, but good, reproduction of 

 it was given in "Science," 1 Vol. IV., p. 360,, October, 1884, Cam- 

 bridge. A correct and successfully executed reproduction of Col- 

 lomb's water colour picture of the " Hotel des Neuchatelois '' is 

 given in Vol. I., opposite p. 202. In August, 1884, several pieces 

 with inscriptions on them were found at a great distance : twenty- 

 four hundred metres lower than the position of the hotel, as deter- 

 mined by Agassiz in 1842, giving an average annual velocity of 

 fifty-five meters. Thus, many years after his death, Agassiz, 

 through his inscriptions on the boulder, is still the promoter of 

 valuable discoveries on the Aar glacier. 



VOL. 11. s 



