Middle Atlantic States.—New York, New Jersey, Pennsylvania, Delaware, Maryland, District of Columbia, and Virginia as the Middle States, and that part of those States lying east of the Alleghanies as the Middle Atlantic States.
Middle Eastern Rocky Mountain Slope.—Eastern Colorado, Southern Nebraska, Kansas, northwestern portion of Indian Territory, portion of northern Texas, also a portion of Northeastern New Mexico.
Middle Pacific Coast Region.—Those portions of California west of the Sierra Nevadas and north of the 37th parallel of latitude.
Middle Plateau District.—Western Colorado, Utah, Nevada, southwestern corner of Wyoming, and the portions of California lying east of the Sierra Nevadas.
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 Pittsburg, Pa., to Cairo, Ill.