Comments on the relationship between the plane of the earth's orbit and the obliquity of the ecliptic.
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Comments on the relationship between the plane of the earth's orbit and the obliquity of the ecliptic.
Comments on proofs [of Principles of geology, 10th ed. (1867–8)]: CL does not allude to the specialisation of classes.
Discusses CL’s argument from the absence of Cetacea in Secondary rocks;
finds his discussion of man "superfluous and too orthodox".
More comments on proofs [of CL’s Principles of geology, 10th ed.]. Discusses permanence of continents and other points.
Refers to passage describing evaporation of snow in Journal [of researches, pp. 277–8].
Cites astronomers’ views on increasing length of day.
Comments on some of CL's writings; further argues that a canal at Suez and/or Darien would have a major effect on European climate due to the effect of ocean currents coming through such canals.
Some minor suggestions regarding CL's proofs [see CL's 1866-10-19].