Abstract
WITH reference to Mr. Norman Lockyer's and Prof. Brücke's observations on the appearance presented by the shadow of the earth at sunset or sunrise (NATURE, vol. xviii. p. 223), I beg to be allowed to confirm them by my experience in Switzerland. Early starts for expeditions give one, among other good things, opportunities for seeing sunrise from the very beginning, and I have repeatedly seen the shadow of the earth, as it were, gradually driven down by the illuminated portion of the sky, the boundary between them being very well marked and roughly circular like the horizon, but I think with a greater apparent curvature. At this distance of time (some years) I cannot remember anything of an effect of foreshortening such as Prof. Brücke notices.
Article PDF
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
POLLOCK, F. Physical Science for Artists. Nature 18, 249 (1878). https://doi.org/10.1038/018249b0
Published:
Issue Date:
DOI: https://doi.org/10.1038/018249b0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.