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On the phenomena of hybridity in the genus Homo
20857
On the phenomena of variation and geographical distribution as illustrated by the Papilionidæ of the
20858
On the red staircase
20859
On the right of the British line
20860
On the supply of printed books from the library to the reading room of the British Museum
20861
On the theory of the infinite in modern thought
20862
On the uncertainty of the signs of murder in the case of bastard children
20863
On the various forces of nature and their relations to each other
20864