Fig.1. PLATE I. (AFTER BEALE & FREY.) MODE OF ORIGIN OF LIVING CENTRES IN ALREADY EXISTING 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 ova undergoing development in the midst of a delicate tissue constituting the ovary and composed of cells. The orum seeins 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 THREE COLORED PLATES .CBOSTON: JAMES R. OSGOOD AND COMPANY, |