[Jeanne C.] Carr
from bank to bank past a plumb line made of a stone & a black horse hair. On observing my stakes on the 6th of October or in 46 days after being planted I found that Stake No 1 had been carried downstream 11 inches, No 2, 18 inches No 3, 34 No 4, 47 inches, As stake No 4 was near the middle of the glacier, perhaps it was not far from the point of maximum velocity, 47 inches in 46 days or 1 inch per day Stake No 5 was planted about midway between the head of the glacier & stake No 4 its motion I found to be in 46 days 40 inches. Thus these ice masses are seen to possess the true glacial motion. Their surfaces are striped with bent dirt bands. Their surfaces are bulged & undulated by inequalities in the bottom of their basins causing an upward & downward swedging corresponding to the horizontal swedging as indicated by the curved dirt bands. The Mt McClure glacier is about one half miles in length & about the same in width at the broadest place. it is crevassed on the South- East Corner The crevasse runs about SW & NE & is [deleted: no where] several hundred yds in length Its width is nowhere more than one foot in width. The Mt Lyell glacier separated from that of McClure by a narrow crest is about a mile in width by a mile in length. [deleted?: I have planted stakes in the glacier of Red Mountain also but have not yet observed them.]
1872 Oct 8
Original letter dimensions: 20.5 x 25.5 cm.
Reel 02, Image 0951
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