Ice

Scope and Contents Letter from Alexander Wilson, and his son, to Joseph Black regarding thermometers, clouds, air pressure and the evaporation of ice.

Scope and Contents Letter to Sir Charles Lyell from James Croll concerning the effect of the build up of ice during the glacial epoch upon the level of the ocean and his belief that the level of the ocean would not be lowered by the accumulation of ice as the level of the water would adjust itself to the altered centre of gravity of the earth, 4 January 1866.

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.

Scope and Contents Letter to Sir Charles Lyell from James Croll concerning the temperature of the earth in both winter and summer and how this temperature is affected by the position of the earth in relation to the sun and snow and ice throughout the world, 23 April 1866.

Scope and Contents Notes for 6 lectures on 'Geographical Evolution', encompasing a wide variety of related subjects. Sir Archibald Geike looked at various geological periods and how both the areas occupied by land and water changed over time. He looked at the creation of many geological formations, at the materials they were composed of and the processes involved, including the infleunce of different elements within the natural world. He used as examples numerous locations, mostly within the British Isles but...