LOCOMOTOR ATAXIA, TABE

DORSAL IS, disease a ociated wit progre ive degeneration of the poster i columns and nerve roots of the spin cord. There are three stages: at fir lightning pains in the legs, constrictir pains round the body, lo of sensibilit in tho logs, etc.; then unsteadme , lo: of muscular tone, a, distinctive stamping ' gait, eye disturbances, and derangements of internal organs; while in the most advanced stage there is paralysis, the patient being unable to walk. The causes are syphilis (most generally), and injury or exposure to extreme emperatures. The progre of the _ disease may be arrested at an early stage, even advanced cases may improve, put complete recovery is practic all _ migrate in vast numbers, removing ' every particle of plant ti ue they ' encounter, with the result that they often produce famine, and, on the - putrefaction of their bodies, disease. _ Various species are found in N. America, the Antipodes, S. Africa, and other » regions of the world—the locust of the + Biblical ‘plagues’ probably being Schistocerca peregrin a, which ranges from N. Africa to Southern India.