Practical hydropathy, including plans of baths and remarks on diet, clothing and habits of . alled the membranous canals. These include within them thebranches of the auditory nerve, which pass through the semicircular canals, andthey are distended by a specific liquid called endolymph, in which the nervousfibres are bathed.^ The bony canals around these membranous canals are filledwith another liquid, called perilymph, which also fills the cavities of the vestibuleand the cochlea. It appears, therefore, that all the cavities of the internal earare filled with liquid, and it must, accor
Practical hydropathy, including plans of baths and remarks on diet, clothing and habits of . alled the membranous canals. These include within them thebranches of the auditory nerve, which pass through the semicircular canals, andthey are distended by a specific liquid called endolymph, in which the nervousfibres are bathed.^ The bony canals around these membranous canals are filledwith another liquid, called perilymph, which also fills the cavities of the vestibuleand the cochlea. It appears, therefore, that all the cavities of the internal earare filled with liquid, and it must, accordingly, be by this liquid that the sonor-ous undulations are propagated to the the auditory nerves. The liquid,being incompressible, the pulsations imparted either by the auricular chain ofbones, or by the air included in the cavity of the middle ear, or by both of these,to the membranes which cover the fenestra ovalis and the fenestra rotunda, arereceived by the liquid perilymph within these membranes, and propagated by itand the endolymph to the various fibres of the auditory TEHSFECTCTVE VIEW OP THE SPIRAL LAMINA, WITH THE FILAMENTS OP THBAUDITORY NERVE UPON IT, DIVESTED OF THE COCHLEA. — Sappey. 428 HAKDrOOK OF HYDROPATHY. VISION. The function which enables us to perceive the magnitude, figure^colour, distance, &c. of bodies.—The organs which compose the apparatus ofvision enter into action under the influence of a particular excitant, or stimulus,called light. The_ properties of light, and the laws which regulate its move-ments, form the objects of the science of optics. In presenting the followingaccount of the mechanism and conditions of vision, we must presume thereader to be acquainted with the principles of optics, and with the anatomicalstructure of the eye and its appendages. An explanation of the former wouldbe foreign to the scope of this dictionary; an account of the latter is givenunder the head Oculus. Mechanism of Vision.—In order the b
Size: 1843px × 1356px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookd, booksubjectbaths, booksubjecthydrotherapy
