This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...and an increased amount of blood to a part, and vaso constrictors, stimulation of which cause constriction or contraction of the blood-vessels and a diminished amount of blood to a part. This last named system is very important to the practitioners of manipulatory forms of healing, and has nly in the past few years been known to any extent, the vaso motor center being discovered by Schiff in 1855, and more accurately localized by Ludwig in 1871. The cranial nerves are those that have their apparent origin in the cranium. Sommering and other European anatomists name twelve pairs, while Willis and a few other authors designate only nine pairs, according to the order in which they pass out of the base of the brain. Neuritis (neu-ri'-tis). Inflammation of the optic nerve. Neurology (nu-rol'-o-je). A study of the nervous system. Neurodealgia. Pain or excessive sensibility of the retina. Neurodeatrophla. Atrophy of the retina. Neuroretinitis (neu-ro-ret-in-i'-tis). Inflammation of the optic nerve and retina. Neutralize (neu'-tral-ize). The method of counterbalancing or doing away with power in lenses. In order to det rmine whether a lens is of plus or minus power, hold It up and look at some distant object through it, then move the lens from side to side and if the object appears to move in the opposite direction to the movement of the lens it is a plus lens. If you wish to find its dioptric power, take from your trial case a minus lens and put them together and again look through them at the object, and should the object still move against the movement oŁ the lenses the minus is not strong enough. On the other hand, should the movement be reversed and now the objects appear to move with the lenses the minus is too strong, and you must find the minus lens th...
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