Observations made at the Blue Hill Meteorological Observatory, Massachusetts, U. S. A., in the Years 1897 and 1898. Under the direction of A. LAWRENCE ROTCH, A.M. With an Appendix containing the International Cloud Measurements during 1896-97. Annals of the Astronomical Observatory of Harvard College. Vol. XLII. Part II. 4to. Cambridge, 1900. Pp. 131-280
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Vol 23
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