The text of the original work has been maintained, except as mentioned below.
Changed for consistency: screwdriver to screw-driver, pene to peen, homemade to home-made, ballbearing to ball-bearing, horse-power to horsepower, double-tree to doubletree, and eye-bolt to eyebolt. In the Index, the following words have been changed to conform to the text: sulkey to sulky, and re-inforced to reinforced. All dimensions have been standardised to a x b (with a and b representing two numbers).
Typographical errors corrected: azotabacter to azotobacter (p. 138), devise to device (p. 232), anarobic to anaerobic (p. 236), and Hayford to Hayfork (Index). Some minor typographical errors have been corrected silently.
Page 158: the so-called humid sections should possibly be the so-called arid sections.
Figure 180 (page 200): contrary to the caption, the mow capacities are not indicated in the illustration.
The advertisements have been re-arranged to a single list per subject.