Key points are not available for this paper at this time.
The research of which this paper gives an account was originated by the late Dr Alexander Bruce and undertaken in conjunction with him; most of the material used had been accumulated by him during the later years of his life. The following preliminary communication made to the Pathological Society of Great Britain and Ireland in July 1910 represents in brief outline the position which had been reached at the time of Dr Bruce's lamented death:—
James Dawson (Sat,) studied this question.