Cellular Pathology as Based Upon Physiological and Pathological History; Twenty Lectures Delivered in the Pathological Institute of Berlin During the (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1860 edition. Excerpt: ...the more I occupied myself with the examination of it, the more did I become convinced that a real boundary between this membrane and the deeper layers of tissue did not exist, and that a membrane could only be spoken of improperly, inasmuch as the notion of a membrane involves the supposition that it is more or less different from the parts beneath it, and constitutes a separable object. Now in the present instance a separation of a rough kind may certainly not unfrequently be effected, but a more delicate kind of separation is altogether impossible. When the surface of any section of 1 This term has had its signification extended by the Author, who takes it to include the whole of the layer (connective tissue as well as epithelium), which rests upon the nerve-fibres and is interposed between them and the cavity of the ventricles.--From a MS. note by the Author. EPENDTMA OF THE VENTRICLES OF THE BRAIN. 275 the ventricular wall is examined with a tolerably high power, the first thing noticed on the surface is an epithelium, sometimes in a better, sometimes in a worse state of preservation (Fig. 94, E). In the most favourable cases we find cylindrical epithelium with cilia, extending throughout the whole extent of the cavity of the spinal marrow (central canal) and of that of the brain (ventricles). Beneath this layer follows a sometimes more, sometimes less pure layer of a structure resembling connective tissue, which at first sight certainly appears to be separated by a sharp outline from the deeper parts, for even with the naked eye, and especially after the addition of acetic acid, an external grey and translucent layer is very distinctly seen, whilst the deeper layer looks white. This white appearance is due to the Fig 94. Fig. 94....