The zero must be arbitrary which divides equally a certain degree of heat from a certain degree of cold.—Ed.
Transcriber’s Notes
Some page numbers do not appear due to removed blank pages.
The list of Contents was added for reader’s convenience.
Punctuation errors were corrected.
Inconsistent hyphenation was retained.
“De la Lande” and “La Lande” both appear in text and were retained.
“Shenier”, editor’s spelling of “Scheiner”, was retained.
On p. 37, a paragraph break was inserted before "There is a clear example ...".
On p. 44, “the” was changed from “The” (the usual method).
On p. 85, “that” was changed from “That” (that a species).
On p. 86, “that” was changed from “That” (that an instrument).
On p. 118, “aëriform” was changed from “aeriform”.
On p. 178, “borrow” was changed from “brorrow”.
On p. 204, “sufficiently” was changed from “sufficietly”.
On p. 219, “quantity” was changed from “quanity” (quantity of gold).
In footnote [5], “psychological” was changed from “pyschological”.
In footnote [23], “that” was changed from “tha”.