Lymphatic tissue; ducts and glands, shown in isolation in 28 numbered illustrations. Duct divided along its length to show valves. Portion of the thoracic duct, popliteal, inguinal, hepatic, and mesenteric nodes shown. Sections of intestine shown with mesenteric arteries, veins and lymphatic vessels shown. Sections of tunica intima, dura mater, pituitary gland, and epithelium taken from the mouth and tongue, urethra, anus, and penis, seen under a microcope. Sections of the lungs, bronchi, trachea, esophagus and pylorus, seen under a microscope.