“Elements of Asteroid 1899 FD.” (by H. K. Palmer), A. N. 3635.
[12] Footnote added in 1908: This concluding paragraph, retained in the present publication for completeness, loses point in some particulars, because the photogravure referred to is not reproduced here. The heliogravure reproduction of the Trifid nebula is No. 55.
[13] Since then a photograph by Dr. Roberts has appeared in Knowledge, 23, 35, February, 1900.