Weber's exper'iment

(va'ber) [Ernst He in rich fVeber, German physiologist, 1795-1878.] If the peripheral end of the divided vagus nerve is irritated the heart is arrested in diastole. W.'s law, (i) when the strength of the stimulus varies in geometric progre ion, the response will vary in arithmetical progre ion. (2) Pechner's* law. W.'S par'adox, if a muscle is loaded beyond its power to contract it may elongate. W.'s syn'drome, paralysis of the oculomotor on the side of the lesion and that of the extremities and of the facial is and hypo glo us on the opposite side; indications of a lesion in the lower and internal part of a cerebral peduncle. W.'s test for indican; the suspected urine is heated with an equal amount of hydrochloric acid, and when it is cool ether is added and the mixture is shaken; if indican is present the fluid will have a reddish hue, the foam being bluish. See also Fried rich Eugen Weber.*