1855.] 



SHARPE — ELEVATION OF THE ALPS. 



123 



Lake of Neufchatel, for which there is no other evidence than that 

 of the existence at this height of erratic blocks f . 



Table III. — General Comparison of the preceding observations. 



Lines of 

 Erosions. 



English feet. 



9000 

 7500 



4800. 



Heads of Valleys. 



7660 



6593 



5756,5835,5895 



5410,5455 



J 5280*, 5257*, 5315*, 5315,1 

 1 5365,5370 / 



4877,4910 



f4626*, 4642, 4642*, 4730,1 

 \ 4763,4776 / 



4400 



4305* 4316* 



4240,4274 



4100,4100,4117,4143,4152 ... 



4058 



3936, 3953, 3954, 3985 



3822,3828,3867 



3597 



2905 



2600? 



2500 



Terraces. 



6100, 6190 

 5900, 5930 

 5650 ? 

 5464 



5200 ? 



5000 } 



4720, 4770, 4780, 4782 



4597 



4422 



4343, 4343, 4350 



4230, 4233 



4150 



4060 



3970, 4000 ? 



r3730, 3770, 3770,3815, 



1 3825, 3865 

 3567 



3415, 3444, 3465 

 3254, 3300, 3300, 3316 

 3100,3113,3113,3120,3175 

 2930, 2930, 2930, 2940 

 2770,2770,2821,2840 

 2690 

 2490 



2330, 2350, 2350 

 2200, 2200 

 2100.? 2145, 2145 

 1650? 1700 

 1234, 1300 

 981, 1000 ? 



The numbers marked ? rest on doubtful measurements. 



The numbers marked * are below the truth. 



The altitudes placed on the same line are supposed to belong to one water-level. 



t In corroboration of my statement of the limited extension of the real proofs 

 of the existence of ancient glaciers, I cannot quote a better witness than M. 

 Agassiz, who, after saying " On ne rencontre des traces de moraines terminales 

 que dans les vallees comprises dans I'interieur des chaines des Alpes," proceeds to 

 account for their disappearance beyond. (' Etudes sur les Glaciers,' p. 63.) The 

 moraine of the Glacier of the Aar, near Berne, lately discovered (see ante, p. 117), 

 is, I believe, the only exception to the accuracy of this statement of M. Agassiz. 

 The only evidence in favour of a farther extension of glaciers is built upon the 

 distribution of gravel and erratic blocks, to which category, 1 believe, that we must 

 refer most of the BlocJcwdlle of M. Escher's Map of the " Verbreitungsweise der 

 Alpen-FUndlinge." 



