[John Muir]


[Jeanne C.] Carr


image preview


[10]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 [11]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.]


Yosemite Valley

Date Original

1872 Oct 8


Original letter dimensions: 20.5 x 25.5 cm.

Resource Identifier


File Identifier

Reel 02, Image 0951

Copyright Statement

The unpublished works of John Muir are copyrighted by the Muir-Hanna Trust. To purchase copies of images and/or obtain permission to publish or exhibit them, see

Owning Institution

University of the Pacific Library Holt-Atherton Special Collections. Please contact this institution directly to obtain copies of the images or permission to publish or use them beyond educational purposes.

Copyright Holder

Muir-Hanna Trust

Copyright Date


Page Number

Page 6


John Muir, correspondence, letters, author, writing, naturalist, California, correspondent, mail, message, post, exchange of letters, missive, notes, epistle