﻿Yol. 64.] AND ANTIGOKITE-SERPENTINES. 163 



which would elsewhere be considered very large, and a host of 

 smaller blocks, represent a scattered moraine of the Schwarzenberg 

 Glacier. In 1905, I described a slice from the least of the trio and 

 this year managed to detach from the Blauenstein itself a loose 

 fragment just big enough to furnish a slice. The rock consists of 

 antigorite, with a fair amount of residual augite in granules suggestive 

 of crushed grains, and some iron-oxide and sulphide. One portion 

 of the slice shows rather distinctly a ' puckered' foliation. Thus 

 the rock has undergone pressure, though it is not now at all fissile. 

 I had neglected to carry away specimens of the AUalin moraine, 

 but that defect was kindly remedied by my friends, Messrs. J. J. 

 Lister, P.R.S., and K. H. Eastall, F.G.S., who brought me three 

 good cabinet-specimens : one barely, another moderately, and a third 

 very fissile, and slightly puckered. A slice from the second shows, 

 as I was certain would be the case, that it is rich in antigorite, 

 much of it small and with a foliated aspect. It also contains a 

 little residual augite and some iron-oxide suggestive of crushing. 



I again visited the great dyke of fissile serpentine ^ which cuts 

 calc-mica-schist on the western flank of a mound on the Eee Alp, to 

 which the figures 2136 metres (7081 feet) are attached. It is marked 

 on sheet xxiii of the Swiss Geological-Survey map, but I think that 

 the breadth is rather exaggerated,^ Its junction with the calc- 

 mica-schist was not well exposed on the more northern side, but on 

 the southern it was clearer ; and, notwithstanding much crushing 

 and an oblique fault, it still remained unbroken for 2 or 3 feet, 

 showing a good weld with a slightly wavy surface. The serpentine 

 also completely overarched a mass of much contorted calc-mica- 

 schist about a couple of yards wide and a little more in height,^ 

 the more northern side of which apparently exhibited a slight 

 interlamination of serpentine and the schist, as if the former had 

 thrust a tongue or two into the latter and both had been crushed 

 out together. On the other side a little Avedge of the schist was 

 isolated in crushed serpentine ; also a small patch of serpentine, 

 measuring about 2 by 3 inches, still adhered to the face of the 

 included mass of calc-mica-schist. I have no recollection of having 

 seen the latter, either in 1891 or in 1901, and the notes then made 

 differ in some details from what we saw last summer, so I think that 

 the face of the cliff" must have been changed in the interval by falls 

 of rock. The serpentine again crops out, after being concealed 

 beneath turf, scree, and moraine, on the steep rocky slope descending 

 to the northernmost arm of the Fee Glacier. Here it is, if possible, 

 yet more crushed, and the junctions are masked. 



Another and much greater mass of serpentine occurs on the same 

 * buttress of an alp ' at a considerably higher level. This is the 

 Langefluh, a broad promontory of rock, about two-thirds of a mile 

 in length, running almost north and south between the arms of 

 the Fee Glacier, and rising ultimately to a height of 2875 metres 



^ The microscopic structure is described at p. 709 of vol. Ixi of this Journal. 

 ^ In the face of the cliif it was perhaps more than 20 yards broad, but the 

 section may be obHque. 



^ This statement is from memory ; I forgot, at the time, to record the figures. 



