[Signed] Schmidt, Carl. Ackererde und Untergrund des Gutes Trubetschino..., 1885. In German.

[Autograph]
Schmidt, Carl.
Ackererde und Untergrund des Gutes Trubetschino 52° 54' n. Br., 39° 35' ö. L. v. Greenwich (9° 15' ö. L. v. Pulkowa) : Kreis Lipetzk, Gouv. Tambow, im Besitze des Herrn Grafen Michael Pawlowitsch Tolstoi: ein Beitrag zur Kenntniss der Schwarzerden Südrusslands.
Dorpat: H. Laakmann, 1885.
***
[With author's autograph]
Schmidt, Carl.
Topsoil and Subsoil of the Trubetschino Estate at 52° 54' N, 39° 35' E of Greenwich (9° 15' E of Pulkovo): District of Lipetsk, Government of Tambov, in the Possession of Count Mikhail Pavlovich Tolstoy: A Contribution to the Knowledge of the Chernozems of Southern Russia (Ackererde und Untergrund des Gutes Trubetschino...).
Dorpat (Tartu): H. Laakmann, 1885.

This specialized soil science study analyzes the famed chernozem (black earth) of the Trubetschino estate in the fertile Tambov region. Authored by the geologist Carl Schmidt and published in Dorpat (Tartu) in 1885, it exemplifies the detailed, locale-specific research conducted on the agricultural resources of the Russian Empire in the late 19th century. The work is notable for its association with Count Mikhail Pavlovich Tolstoy, a member of the distinguished Tolstoy family and likely the landowner, highlighting the intersection of aristocratic patronage and empirical science. A copy bearing the author's autograph adds significant provenance, connecting this scientific pamphlet directly to the scholar who meticulously studied one of Russia's most vital natural assets.