General

This e-text follows the text of the original work, including inconsistencies in spelling, hyphenation, capitalisation and typography. In particular, the following have not been standardised or corrected (except when mentioned below): - the two types of fractions used (2 1 ⁄ 2 and 1-10th, for example); - errors in calculations (for example, constituent parts that do not add up to the total given); - articles that are not in alphabetical order have not been moved (note that I and J are considered to be equivalent, as in Jasper — Icehouse — Jelly); - mi ing reference letters/figures in illustrations; - inconsistent numbering of sections and paragraphs (for example, there may be a paragraph number 1, but no number 2 or further; there may be a section number II, but no number I). Some illustrations are mi ing from the original and are not referred to in the text (Figs. 57, 372), others are provided in the original work, but not discu ed or described. Fig. 93 is not present in the original, but is described in the text. The original has two illustrations numbered 384; the second one (on page 464) has been renamed 384*. Figures 496/497 and 498/499 are remarkably similar, as is their description. Several illustrations referred to in the text do not show the reference letters, numbers or symbols mentioned in the text. Hyperlinks have been provided for explicit internal references, and where they seemed useful. Several wide tables have been optimised for wide (browser) windows and may not look optimal in narrow windows or other formats. For some illustrations enlarged versions are available in order to make details and reference letters better visible (not available in all formats).