Underscores “_” before and after a word or phrase indicate _italics_ in the original text. Equal signs “=” before and after a word or phrase indicate =bold= in the original text. A single underscore after a symbol indicates a subscript. Small capitals have been converted to SOLID capitals. Illustrations have been moved so they do not break up paragraphs. Antiquated spellings have been preserved. Typographical and punctuation errors have been silently corrected. The “CORRECTIONS FOR VOL. III.” listed at the end of the book have already been applied to the text by the transcriber. A MANUAL FOR THE EXAMINATION OF SOILS, FERTILIZERS, AND AGRICULTURAL PRODUCTS.…
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