Creator
John Muir
Recipient
[Joseph] Le Conte
Preview
Transcription
Direction of vertical lines of cleavage at 34 points of observation scattered over the dome-plum[illegible] section belowNorth 35° E " 35 " Look upon Whitneys map & observe how all " 35 " East & West divides of glacier controlling height have " 35 " been bent Southward. I hope to see you " 30 " soon & will therefore wait my Mary says " 30 " etc. " 30 " " 30 " " 35 " " 35 " " 35 " [drawing] " 40 " " 35 " " 65 " " 45 " " 40 " " 45 " " 25 " " 25 " " 35 " Horizontal Section of Sierras Structure of granite with reference to " 35 " North 33° East lines of cleavage? --------- " 35 " This portion of the Sierra is made up of granite Slates " 20 " S N on edge in a nearly perpendicular position & with " 45 " horizontal direction of North 33.25° East " 35 " These cleavage lines must be of great significance " 30 " because of their universality & age. They swerve not " 30 " for any Dome or canon. Some are of clearer development " 30 " then others & in crossing [narrow Dome & brow forms of rock?] ( 5 W) & various canons these cleavage lines of supposed development yield grand " 20 " testimony concerning glacier " 25 " sculpture. I have never seen a dome so hard as to jostle " 35 " these cleavage seams, however homogeneous in appearance " 35 " all granite of this region in canon bottoms or on summits either " 35 " show or may be made to show these lines. Only a few seams are developed so as to be readily traceable for miles, but spray of a fall will develop them to any degree of dest[illegible] or abundance So I say that these mtns are made of slabs of indefinite thinness set on edge at right angles to the direction of the range. [in margin: a block of mtn granite as sec 4 when sprayed by a fall developes to Sec 5 with regular & [measurable?] seams]
Location
Yosemite Valley
Date Original
1872 Apr 20
Source
Original letter dimensions unknown.
Resource Identifier
muir02_0779-let.tif
File Identifier
Reel 02, Image 0779
Copyright Status
Copyrighted
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The unpublished works of John Muir are copyrighted by the Muir-Hanna Trust.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 http://www.pacific.edu/Library/Find/Holt-Atherton-Special-Collections/Fees-and-Forms-.html
Owning Institution
The Bancroft Library, University of California at Berkeley. 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
1984
Page Number
Page 4
Keywords
John Muir, correspondence, letters, author, writing, naturalist, California, correspondent, mail, message, post, exchange of letters, missive, notes, epistle
