290 PEOFESSOK TYNDALL ON THE VEINED SIErCTUEE OF GLACIERS, 
f.™ a wide inegulaily-shapea field of nevfi, it is 
Monte Rosa glaciers to the nanw band represented m the hgme, an 
"xli glacier itself is perhaps a stiU more ^ 
to yield when subjected to pressure for ^ 1^8 I>“ ^ it 3 dkec-. 
much the same as that shown upon e s ■ being hemmed in between 
tion. and to flow as a narrow stnpe al^ th eerrin, A 
the strip of the Schwarze glacier and that of t g 
which the lower portion g ,„g^,ber, 
:: rr” If parX narrow bandsf separated .om each -fier^— ' 
'^'fh::: “eLf -r: 
SSs wht: :“tm“ hm thmst of .he 
mass behind it, we have a finely developed stiuctuie. 
^ 7. Coexkteme of Structure and Strcdificatim.-The Furgge Glaaer. 
The evidence of the association of pressure and glacier hesitation 
laid before the Society, will, I think, be admitted to he ^ “ ompld with it 
in saying that the and well-informed mnid 
Z^'lLZ^rcc of what I have adduced. Difficult as concephon t. h nng - 
hedged that the structure, so fully developed :itbei:; ™Le.ed into 
a turning up of the strata through a groove less than itself in 
a narrow channel,-just as a shee » PJ> ’ structure developed 
width, would turn up at its edges. It might also De „ 
alongside and under the to 
folded-up strata; the perfect welding mutual pressure. This indeed is 
ture being conceded as possible consequences of the mutual piess 
r BaLL® view of the subject; and M. Aoass.. assumes said 
of the Unteraar glacier. With regard to the be ice-faUs. 
that we do not know how the interior of the mass is ,„uld set 
The mind, it is tiaie, finds great difficulty in conceiMne - y o . ^jj^cultv mav 
pressure theory, once for all, beyond the power of sucb attacks. 
