Changed "charactertistics" to "characteristics" on page 3 of part 2: "the distinguishing characteristics."
Changed "mushroon" to "mushroom" on page 5 of part 2: "common field mushroom."
Changed "paraphesis" to "paraphyses" on page 7 of part 2: "spore sack and paraphyses."
Changed "Saac." to "Sacc." on page 8 of part 2: "Mitrula vitellina Sacc."
Changed "tetrasporus" to "tetrasporous" on page 9 of part 2: "being entirely tetrasporous."
Changed "agaricus" to "Agaricus" on page 16 of part 2: "Agaricus arvensis."
Changed "mid-western" to "midwestern" on page 17 of part 2: "and midwestern States."
The arithmetic doesn't work out right for the third house of the Pennsylvania grower on page 17 of part 2. Perhaps it produced 28,000 pounds rather than 2,800. However, I left it as it was.
Removed duplicate word "the" on page 20 of part 2: "add to the manure."
Changed "surfare" to "surface" on page 20 of part 2: "surface be too dry."