sphygmic (sfigmik)

[ ing or pulsatile; beating with rhythmic con traction and dilatation, like a specifically, belonging to the Sphygmic a. Sphygmic a (sfig'mi-kä), n. pl. [NL., IMG:content-1730.png:[graphic][merged small][merged small][graphic][merged small][merged small][merged small][merged small][merged small][merged small] Abbot's Sphinx ( Thyreus abbott ), moth and larva, natural size. sphinx whose larva feeds on the vine. - Achemon sphinx, Phil am pel us achemon. See cuts of moth and larva under Phil am pel us. Blind-eyed sphinx, Paonias excæcat us, a handsome American moth, of a general fawn color, with roseate hind wings ornamented with a blue-centered eyespot, whose larva lives upon the apple. - Carolina sphinx, Protoparce carolina, a mottled gray and black moth whose larva is the tobacco-worm. See cut under tobacco -worm.Catalpa sphinx, Ceratomia catalpæ, an American moth whose larva feeds on the catalpa. - Clear-winged sphinx, a moth whose wings are partly hyaline, as Hemaris diff in is and other members of the same genus; also, improperly, certain of the Sesiidæ. See cut under raspberry -borer.Death's-head sphinx, Acherontia atropos. See cut under death's -head. - Five-spotted sphinx, Protoparce ce leus, a common gray North American moth whose abdomen is marked with five orange spots on each side, and whose larva feeds upon the tomato, potato, and other solanaceous plants. See cut under tomato - worm. - Morning-sphinx, any species of the genus Deilephila, as D. line at a, the white lined morning-sphinx, a common American moth of strik --d IMG:content-1731.jpg:[ocr errors] C Sphygmograph. a , band by which the instrument is fastened on; b, spring which rests upon the artery; c , adjusting-screw (with graduated head) which regulates the pre ure of the spring b according as the pulse is strong or weak; d , d , supports for paper upon which the tracing is made; e', feed-roller, between which and the pre ure-wheels e, e the paper is carried; 1, spring which bears on the shaft of the wheels e, e to engage the paper positively; g , small spring clockwork (incased) by which motion is imparted to the feed-roller e; h, milled-headed winding-key; i , stop-motion; 1, tracer attached to the oscillating arm k, which is moved by the rod that connects this arm with the spring b . The Century Dictionary and Cyclopedia: The Century dictionary sphygmograph a piece of paper moved by clockwork a curve which indicates the changes of tension of the blood within. The paper is blackened by holding it over a smoking lamp, and the tracer, moving in accordance with the pulsations of the artery, indicates the rapidity, strength, and uniformity of beats. The tracings are preserved by a thin varnish of gum damar di olved in benzol in.