ronomical director of the Observa- Observatory party. His special study was the heat of plate, where the negatives are secured. tory, which were stationed at Pinehurst, N. C., Griffin the corona by means of a bolometer, an instrument The Barnesville station was under the immediate and Barnesville,… … details of the corona near the sun are lost, but the gen- showing that they were about five inches apart and Portable Transit House which has been used eral effect, including the length of the corona and the moved at the rate of eight feet persecond. At Barnes- on Many Eclipse Expeditions. polar…
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