Transcriber's note: Text enclosed by underscores is in italics (_italics_). Page numbers enclosed by curly braces (example: {25}) have been incorporated to facilitate the use of the Index. Images of the original pages are available through Internet Archive. See https://archive.org/details/diatomaceofphi00boye…
Or read it translated: 日本語 · 中文 · हिन्दी · Español · العربية · Français · বাংলা · Português · Русский · Bahasa Indonesia · اردو · Deutsch · Kiswahili · 한국어