Includes the 9th-61st annual report of the Agricultural Experiment Station (called 9th-11th, Agricultural College Experiment Station; called 12th-59th annual report of the Experiment Station) and issued by Michigan State College (called earlier, State Agricultural College (Mich.); Michigan Agricultural College).

The work covers military signaling and the weather service. The latter brand was transferred in 1890, to the Weather Bureau, organized under the Dept. of Agriculture.

Vols. for 1889-1894, 1906-1912 issued with the Annual report of the Massachusetts Agricultural Experiment Station; vols. for 1895-1905 issued with the Annual report of the Hatch Environment Station of the Massachnusetts Agricultural College.