184 GLOSSARY. 



Sapon'ification (L. sapo, soap ; facto, I make). The splitting 

 up of a fat into fatty acid and glycerine, by means of 

 alkalies. 



Sarcogli'a (Gr. sarx, flesh; gloia, glue). The protoplasmic 

 mass of which a motor nerve ending is chiefly composed. 

 (Kiihne.) 



Sarcolac'tic acid (Gr. sarx, flesh; Lat. lac, milk). An acid 

 formed during contraction of muscle. 



Scarpa, Membrane of. A delicate membrane which fills up 

 the fenestra rotunda, so closing the tympanic end of scala 

 tympani. 



Schemer's experiment. A method of demonstrating the act 

 of accommodation for light. 



Schizomyce'tes (Gr. schizo, I cleave ; mukes, a fungus). Patho- 

 logical fungi or bacteria. 



Schreger's lines. Curved wavy lines in dentine. 



Schwann, Sheath of. The medullary or white covering of a 

 nerve. 



Scolio'sis (Gr. scoliosis). Lateral curvature of the vertebral 

 column. 



Scotd'ma (Gr. skotoma, dizziness). Blindness limited to certain 

 portions of field of vision. 



Serum globulin. Another term for paraglobulin. 



Sharpey, Fibres of. Calcified connective tissue fibres, which 

 bind together the lamellae of bone. 



Shrapnell, Membrane of. A loose portion of tympanic mem- 

 brane which fills up the notch of Rivini. 



Ska'tol (Gr. skor, gen. skates, dung). A fetid decomposition 

 product resulting from the continued action of pancreatic 

 juice upon proteids. 



Skele'tal nerve (Gr. skeleton, from skello, I dry). Also 

 called " Somatic." Applied to nerves which supply skeletal 

 structures as distinguished from splanchnic or visceral 

 nerves. 



Spasm centre. A supposed centre in medulla oblongata, 

 stimulation of which produces general spasms or convul- 

 sions. 



Specific energy, Law of. So named by Miiller, as showing 

 that each sense organ has a specific form of stimulus best 

 adapted to act upon it. 



Spherical aberra'tion (Gr. sphaira, a globe; L. ab, from; 

 errO) I wander). A blurring of the image, due to central 

 and peripheral parts of lens refracting unequally. 



