Word: spectras
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Dates: during 1887-1887
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...other places by funds administered at Harvard. During the past year the Observatory has lost the services of Prof. Rogers, for a long series of year an indefatigable worker with the meridian circle. As a memorial to the late Prof. Henry Draper, the study of the photography of stellar spectra undertaken by him is now, through the liberality of Mrs. Draper, being prosecuted on a scale appropriate to the advance in this department of science, and forms an important extension of the work of the Observatory. The meridian photometer has been kept in active service throughout the year, and leaves...