Societies and Academies

Abstract

LONDON. Royal Microscopical Society, February 17.—A. Piney: The principles of hægmatological differentiation. An attempt to classify the normal leucocytes of human blood on purely morphological grounds. The characters of the nuclei must be regarded as the determining feature, particularly the distribution of the two forms of chromatin. Cells with sharp distinction of the chromatin into two types were derived from the bone marrow (myeloid cells), while those with incomplete separation of the two substances in the nucleus were of lymphatic origin. The technical details of preparing the films were discussed.