—, ibid, S. D. Poisson, xxxiv, 157.
— of the terrestrial globe, xxvi, 10; xxxii, 1.
— of the earth at different depths, remarks on, xxiii, 14; xxxiv, 36; xxxv, 293; xliii, 176.
— —, in deep mines, xxxv, 297; xl, 333.
— — increasing with the depth, early experiments upon, by Joel Lean, xl, 332.
— — at different depths, near Madgeburg, xxxvi, 203.
— —, interior of, R. Patterson, xxxvii, 357.
— —, variations of internal, producing elevations and depressions in the earth's crust, C. Babbage, xxvii, 408.
— —, oscillations of annual, extinguished at different depths in different rocks, xxxviii, 109.
—, supposed difference of, between the air and the earth, W. M. Carpenter, xliv, 50.