Instructions for Observing the Total Eclipse of the Sun January 1 1889
Instructions for Observing the Total Eclipse of the Sun January 1 1889
David P David Peck Todd
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5 ; also whether they are equally bright throughout, or whether they are quite bright in some parts, and very faint in others. All details of their structure should be as carefully recorded as possible, in the 12 INSTRUCTIONS FOR OBSERVING rapid sketch; and the observer should make out, if practicable, whether the ends of the streamers are alike or different, somewhat resembling Fig. 5. The sketch actually made during the eclipse should not under any circum- stances be altered afterward ; but i...f the observer saw additional features which he can carry in memory, these may be embodied in a second drawing which should be finished immediately. Descriptions of certain features by letter will be valuable, if the observer could not succeed in drawing them satisfactorily* The sketches should be sent off without any comparison with the similar work of others. State the size of the dark disk, and its distance from the eye. CLASS D. SIMPLE DURATION OF TOTALITY, To make this observation to good advantage, the observer should be located within a few miles of the north or south edge of the shadow-path.
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