John Muir


image preview


It is attracted to the centre because being a sphere each side is equal so that as many particles will attract on one side as on the other of a line drawn from centre.

A [body] within a hollow homogeneous sphere will remain wherever it is laced since it is always equally attracted. Suppose a body placed at A [sketch of sphere] it will be attracted equally on all sides supposing the sphere cut into cones those cones would sustain a constant relation between [their] size and distance from the body. Gravity varies on the earth as the dis [distance] from the poles and also from the [eq] equation by centrifugal force and [flatness] of the earth at poles.


[sketch: sec [section] first [hor] [horizontal] than [down]

Just back of cascade from up most main can [canyon] Ten [Tenaya]


Date Written


Contributing Institution

Holt-Atherton Special Collections, University of the Pacific Library

Rights Management

To view additional information on copyright and related rights of this item, such as to purchase copies of images and/or obtain permission to publish them, click here to view the Holt-Atherton Special Collections policies.