In this plain text version, bold script is denoted by =equals signs= and italic script by _underscores_. Underscores are also used with curly brackets to represent subscripted characters (e.g. CO_{2}). Text that was originally rendered in small capitals now appears in full capitals. Footnotes are located below the relevant paragraphs. The book contains numerous spelling inconsistencies. No change has been made to those representing archaic spellings (e.g. 'somethimes', 'urin', 'feavers', 'joynts') and those occurring in quotations. Spelling variants occurring with similar frequency have been left in their original form (e.g. Röntgen/Roentgen, rachitic/rhachitic, albumen/albumin - the correc…
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