Missouri Valley.—A belt of country 200 miles broad, from Fort Sully, Dak., to Jefferson City, Mo.
New England States.—Maine, New Hampshire, Vermont, Massachusetts, Connecticut, and Rhode Island.
Northern Rocky Mountain Slope.—Those portions of Montana and Wyoming lying east of the Rocky Mountains, Southwestern Dakota, and Northwestern Nebraska.
North Pacific Region.—Those portions of Oregon and Washington Territory lying west of the Cascade range.
Northern Plateau District.—Portion of Western Wyoming, Western Montana, Idaho, and the portions of Oregon and Washington Territory lying east of the Cascade range.
Ohio Valley.—The belt of country, about 200 miles broad, from Pittsburgh, Pa., to Cairo, Ill.
Rio Grande Valley.—Southwestern Texas below the junction of the Rio Pecos with the Rio Grande.
South Atlantic States.—North Carolina, South Carolina, Georgia, and Northern and Eastern Florida.
Southeastern Rocky Mountain Slope.—Southeastern New Mexico, Central and Western Texas.
South Pacific Coast Region.—Those portions of California west of the Sierra Nevadas and south of the 37th parallel of latitude.