I. u. II. Band, zusammen bezog., brosch. 18.—M., geb. 20—M.

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Transcriber's Notes

Obvious typographical errors have been silently corrected. Variations in hyphenation have been standardised but all other spelling and punctuation remains unchanged.

Page [61]. “cacao-red, which latter is represented by the formula C17H12(OH)10.” The first digit in the {10} is illegible in the original, 1 is a best guess.

Page [134] “For this reason the 6, 9 or even 12 roller mills have been more discarded since the last grinding process has been perform granite rollers (cold process).” corrected to performed by.

Page [159]. “By a special arrangement, the number of revolutions in relation to the number of the elevations of the slab is reduced by one fourth, viz., from 760 to 190.” by corrected to “to”.

Part III section headings added.