= Principles of Geology by Charles Lyell (1830)
{c}
{title2=1830}
https://darwin-online.org.uk/converted/Ancillary/BeagleLibrary/1830-3_Lyell_A505/1830_Lyell_A505.1.html
https://library.si.edu/digital-library/book/principlesgeolovol1lyel
Volume I of the first edition. Its title specifies explanation of former changes by reference to causes now in operation. This narrow title-page claim is the one cited here; no later-edition passage is presented as an inspected first-edition passage.
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