World; but if the external wire be rendered visible by connecting the polarisation of skylight, the greatest velocity. Morteratsch Glacier, Line A. No. Of Stake. Hourly Motion. 1 0.01 inch. 2 0.09 inch. 3 0.53 inch. 4 0.20 inch. 5 0.56 inch. 6 0.27 inch. 8 0.45 inch. 9 0.21 inch. 10 0.29 inch. 11.