( 376 ) 
Aet. XXVI. — Geological Thermometer, shewing the Opinims attri- 
buted to various Geologists with respect to the Origin of Rocks. 
100 Plutonic All Rocks affected by 
Whiston, Theory of the Earth, 1725. 
BuFFOjf, Theorie de la Terre. 
Leibnitz, Protogaea, 1768, 
DES(^AETES. 
'Boue', Essai sur I’Ecosse, 1822. 
Hutton, Theory of the Earth, (Ed. Trans, v. i.; 
Platfair, Illustrations, 1820. 
Sir J. Hael, Edin, Trans, vol. vi. 1806. 
Sir G. Mackenzie, Travels in Iceland, 1810, 
H. Davy, On Cavities in Rock Crystal, 1822, 
MacCulloch, Various paper s in Geol. Trans, 
from 1814 to 1817. 
Knight, Theory of the Earth, 1820. 
Brieslac, Journal de Physique, vol. xciii. 
Faujas St, Fond, Essais Geologiques. 
Humboldt, Travels and Memoirs. 
Spallanzani, Sur les Isles Ponces.. 
Sir W. Hamilton, Memoirs, &c. 
Dolomieu, Voyage aus Isles de Lipare, 1783. 
Saussure, Voyages dans les Alpes, 1787. 
W. Watson, Section of Derbyshire, &c. 
Whitehurst, Theory of the Earth, 1786. 
Cordier, Sur les Substances Minerales dites 
en masse, 1815. 
Von Buch,, T ravels, Memoirs, &c. 
Buckland, Memoirs.' 
Conybbare, Geology of England, 1822. 
Sedgwick, 
Henslow. 
Dolomieu, Journal de Phys. vol. xxxvii. 1790. 
Saussure, Journal de Phys. (an. 2.) 1794. 
Daubuisson, Ib. 1804, Sur Volcans d’Auvergne. 
Da_ubeny, Edin. Philos. Journ. 1821, On the 
Volcanoes of Auvergne* 
Daubuisson, on the Basalts of Saxony, 1803. 
Deluc, Treatise on Geology, 1809. 
Klaproth, Beitrage, vol. iii. 
Jameson, Edinburgh Philos. Journal, 1819. 
Richardson, On the Giant’s Causeway, Ph. Tr. 
Macknight, Wernerian Memoirs, 1811, 
Jameson, Geognosy, 1808. 
Murray, Comparative View, 1802. 
Mohs, Memoirs,- &c. 
Kirwan, Geological Essays, 1795. 
Walker, Lectures, 1794. 
Werner, Theory of Veins, 1791. 
Lamarck, Hydrogeologie, 
Dbmaillet, Telliamed. 
Region. heat. The Earth struck 
— 95 
Comet. 
All Rocks of Chemical 
90 
origin igneous. 
1 — 
All the older rocks either 
— ■ 
fused or softened-' by 
— 85 
heat. Metallic Veins 
ZZ 
injected from below. 
' — 
Granitic Rocks igneous. 
■ 
Granitic Veins inject- ‘ 
75 
ed from below. 
Some Granite and Sie- 
zz 
nites igneous. 
_ rjQ 
Volcanic 
Region. 
All Trap Rocks igneous. 
— 65 
— 60 
• 
— 55 
Augite Rocks igneous. 
50 
Flcetz-trap Rocks igne- 
— 
ous. Whin-dikes in- 
— • 
jected in a fluid state 
45 
from below. 
— 
Some Floetis-traps igne- 
— 40 
— 35 
ous ; others aqueous. 
— Neptunian Igneous origin of any 
30 
Region, 
Trap Rocks question- , 
ed. Whin-dikes co- 
— 
temporaneous with the 
— 25 
-rocks they traverse. 
— 20 
All Rocks (except the 
Volcanic) deposited 
ZZ 
from aqueous solution. 
III- 15 
Metallic Veins pour- 
— 10 
ed in from above, 
■i 
Secondary Rocks secret- i 
- 5 
ed by animals and ve- „ i 
getables, and formed 'j 
out of Water. S 
