Knorre, Victor. **F.5121.17.9 Zonenbeobachtungen angestellt am Berliner Aequatoreal vermit- telst des Registrirmikrometers, — Berlin. Diimmler. 1901. 61 pp. [Beobachtungs-Ergebnisse der K6niglichen Sternwarte zu Berlin. No.9.] 31 cm., in 4s,
[This work is kept on the Special Libraries Floor.]
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Public Library, March 13, 1911.
*. This card was printed at the Boston =
5001 — Astronomical ubservations. — Micrometer. Self-registering. — S.r.c.