Croll, James, 1821-1890 (physical geologist and Keeper of Maps and Correspondence, Geological Survey of Scotland)
Person
Found in 25 Collections and/or Records:
Letter to Sir Charles Lyell from James Croll, 6 January 1866
Item
Identifier: Coll-203/1 folio(s) 593-594
Scope and Contents
Letter to Sir Charles Lyell from James Croll regarding modifications he has made to his Submergence Theory which held that the level of the ocean would not be lowered by the accumulation of ice due to Lyell passing on some calculations as to the amount of water needed from the oceans to form an ice-sheet of sufficient mass to alter the earth's centre of gravity. He encloses a letter to the Reader to put the matter straight and asks for Lyell's approval. 6 January 1866.
Dates:
6 January 1866
Letter to Sir Charles Lyell from James Croll, 8 January 1866
Item
Identifier: Coll-203/1 folio(s) 595
Scope and Contents
Letter to Sir Charles Lyell from James Croll regarding another alteration to his Submergence Theory which he explains in sheets which he encloses for Lyell to send to The Reader with his earlier letter (See Lyell 1/593-594). His alterations concern the structure of ice caps which have a solid crust covering and a liquid nucleus, 8 January 1866.
Dates:
8 January 1866
Letter to Sir Charles Lyell from James Croll, 12 January 1866
Item
Identifier: Coll-203/1 folio(s) 596-598
Scope and Contents
Letter to Sir Charles Lyell from James Croll concerning the rigidity of the Earth's crust and the submergence theory. He encloses a copy of his article entitled On The Excentricity of the Earth's Orbit, 12 January 1866.
Dates:
12 January 1866
Letter to Sir Charles Lyell from James Croll, 16 January 1866
Item
Identifier: Coll-203/1 folio(s) 599-602
Scope and Contents
Letter to Sir Charles Lyell from James Croll apologising to Lyell for inadvertantly misrepresenting Lyell's view of the Submergence Theory causing him to write a letter of explanation to the Reader. Croll outlines how such a thing could have happened and points out why he thinks Lyell is mistaken in his objections to the theory, 16 January 1866.
Dates:
16 January 1866
Letter to Sir Charles Lyell from James Croll, 8 February 1866
Item
Identifier: Coll-203/1 folio(s) 603-604
Scope and Contents
Letter to Sir Charles Lyell from James Croll concerning the effect of ice-caps upon the level of the ocean and announcing the publication of an important paper by Rev. G Fisher on the subject, 8 February 1866.
Dates:
8 February 1866
Letter to Sir Charles Lyell from James Croll, 16 February 1866
Item
Identifier: Coll-203/1 folio(s) 605
Scope and Contents
Letter to Sir Charles Lyell from James Croll concerning the extent to which the centre of gravity of the earth would be displaced by ice caps 2000 feet and 3000 feet thick, 16 February 1866.
Dates:
16 February 1866
Letter to Sir Charles Lyell from James Croll, 17 February 1866
Item
Identifier: Coll-203/1 folio(s) 606-607
Scope and Contents
Letter to Sir Charles Lyell from James Croll concerning calculations of Charles Moore's which Lyell had sent to him and discussing his own calculations which show how much the centre of gravity of the Earth would have been displaced by the weight of ice-caps, 17 February 1866.
Dates:
17 February 1866
Letter to Sir Charles Lyell from James Croll, 28 February 1866
Item
Identifier: Coll-203/1 folio(s) 608-609
Scope and Contents
Letter to Sir Charles Lyell from James Croll concerning the calculations made by himself and Charles Moore as to the shift in the centre of gravity due to ice-caps and concerning Solstitial points and Perihelion in the earth's orbit, 28 February 1866.
Dates:
28 February 1866
Letter to Sir Charles Lyell from James Croll, 6 March 1866
Item
Identifier: Coll-203/1 folio(s) 610
Scope and Contents
Letter to Sir Charles Lyell from James Croll concerning the view of "the most eminent physicist that Scotland Possesses", Lord Kelvin, that a paper by Mr (Douglas) Heath is full of glaring errors and that Croll expects the Philosophical Magazine for the following month to have something further on the subject, 6 March 1866.
Dates:
6 March 1866
Letter to Sir Charles Lyell from James Croll, 17 April 1866
Item
Identifier: Coll-203/1 folio(s) 611-612
Scope and Contents
Letter to Sir Charles Lyell from James Croll concerning the quantity of heat received from the sun between two equinoxes, the effect of Perihelion and Aphelion on the length and strength of summers and winters and the effect of the formation of ice and snow on the levels of heat given off from the earth, 17 April 1866.
Dates:
17 April 1866