Observations and investigations made at the Blue Hill Meteorological Observatory, Massachusetts, U.S.A., in the years 1903 and 1904, under the direction of A. Lawrence Rotch by Edward C. Pickering, Abbott Lawrence Rotch

Observations and investigations made at the Blue Hill Meteorological Observatory, Massachusetts, U.S.A., in the years 1903 and 1904, under the direction of A. Lawrence Rotch