Fig.1. PLATE I. (AFTER BEALE & FREY.) MODE OF ORIGIN OF LIVING CENTRES IN ALREADY EXISTING BIOPLASM. Fig. 2. Production of formed material, layer within layer, Fig. 3. Minute particle of bioplasm from living pus rodoth of an inch One of the mucus corpuscles represented in Fig 1, in a living state, magnified by the 2800 diameters, showing alterations iu form during one minute. Fig. 5. Fig 4. Most minute ovarian ora undergoing develop. ment in the midst of a delicate tissue con. stituting the ovary and composed of cells. The orum seeing to arise by the growth of one of these. Magnified 500 diameters. 220 DEVONSHIRE ST BOSTON BIOLOGY, WITH PRELUDES ON CURRENT EVENTS. BY JOSEPH COOK. "Wie ausnahmslos universell die Ausdehnung, und zugleich wie völlig untergeordnet die Bedeutung der Sendung ist welche der Mechanismus in dem Baue der Welt zu erfullen hat." — HERMANN Lotze. THREE COLORED PLATES AFTER BEALE AND FREY. .CBOSTON: JAMES R. OSGOOD AND COMPANY, |