GLOSSARY. STOMACH SYMMETRY. 609 



fibres to contraction. These are sometimes reduced to such orders 

 as, 1, mechanical ; 2, chemical ; 3, electrical; and, 4, mental. 



STOMACH. The same as vetitriculita in Latin, and as yaarrig in Greek ; 

 the proper stomach, having its cardiac, or higher orifice, in the 

 gullet, and its lower orifice in the duodenum ; the organ in which 

 chyme is formed by the gastric juice. 



STRIPED AND UNSTRIPED MUSCULAR FIBRES. The striped muscular 

 fibres correspond with the fibres of the voluntary muscles ; the un- 

 striped with the involuntary muscular fibres, with the exception of 

 the heart, the fibres of which are striped. The stripes are trans- 

 verse. 



SUDORIPAROUS GLANDS. Glands existing everywhere in the skin, 

 but particularly in the palms of the hands and soles of the feet, 

 composed of a lobular mass apparently formed of a coil of tubular 

 gland-duct, surrounded by blood-vessels, and imbedded in the 

 cutaneous adipose tissue. 



SULPHUR. A non-metallic simple combustible, existing largely in 

 mineral nature, chiefly in combination with metals ; entering also 

 into the constitution of plants and animals. See p. 299. 



SULPHURIC ACID. One of the most powerful of the acids, consist- 

 ing of sulphur and oxygen (SO 3 ). The salts which it forms are 

 called sulphates. The sulphates found in the animal body are the 

 sulphate of potash, the sulphate of soda, the sulphate of ammonia, 

 the sulphate of lime. 



SUPERFCETATION. The supposed conception of a new embryo in a 

 female that has already conceived. Its possibility has often been 

 denied ; and, indeed, except at a very early period, it is impos- 

 sible. 



The following case occurred to one of the authors of this trea- 

 tise : He had a greyhound bitch, all white, from which he wished 

 to breed when in season, and accordingly procured a well-bred dog, 

 all fawn, with which the greyhound was shut up for a fortnight. 

 After which, the greyhound's period being, as he thought, over, he 

 sent away the dog. Nevertheless the greyhound admitted, the day 

 after, the embrace of a smooth-haired pointer, white, with large 

 patches of black, which had long been her companion. In due 

 time the greyhound brought forth two pups one a pure-breed 

 fawn-coloured greyhound bitch, the other an apparently pure-breed 

 rough setter white and black bitch. The latter, it could not be 

 doubted, was the progeny of the pointer dog, as the former was no 

 less certainly that of the greyhound dog. The exact parentage of 

 the pointer was unknown. 



SYMBIOTES. See Parasite. 



SYMMETRY, SYMMETRICAL. Terms in physiology most commonly ap- 

 plied to the organs or parts which are double, one situated cor- 

 respondingly on each side of the plane dividing the body vertically 



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