Annals of the Astronomical Observatory of Harvard College Volume 21, Pts. 1-2

Annals of the Astronomical Observatory of Harvard College Volume 21, Pts. 1-2

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1889 edition. Excerpt: ... the previous year. Table XI contains geographical data for all stations reporting during 1888. An asterisk in the column of elevation indicates that the value there given is only approximate. The observers themselves are in most cases the authority for these data. The distribution of the stations is illustrated in plate IV, where the numbers correspond to those in the first column of this table. Table XII is the annual summary for 1889 for such stations as have reported continuously through the year. The daily means, from which the monthly and annual means are computed, are reduced from the arithmetical means of the actual observations by applying the corrections proper to the hours of observation according to the data of volume XXI of the Smithsonian Contributions. In determining the number of rainy days, those were counted in which 0.01 inch or more of precipitation was recorded. Table XIII, XIV, and XV contain barometric records reduced to sea-level, with the addition of the mean monthly relative humidity in table XIII. The values of the highest and lowest readings for Nashua, Blue Hill, Providence and New York (a) are taken from self-recording barographs (See p. 145). Table XVI and XVII exhibit the departures of the mean monthly temperatures and the total monthly precipitation of 1889, for those stations having a record of ten years or more. The general departure of temperature and precipitation from the normal in New England has been considered on page 112. Table XVIII contains the maximum velocity of the wind in miles per hour and the total movement of the wind of each month for all stations where anemometers are used. Tables XIX and XX, occupying pages 153 to 189 and 190 to 213 respectively are reprinted from the Bulletins more

Product details

  • Paperback | 54 pages
  • 189 x 246 x 3mm | 113g
  • United States
  • English
  • black & white illustrations
  • 1236848438
  • 9781236848437