Show I Three Senses Combine to Give Us Balance UR sense of balance is due not OUR merely to tho- tho semi-circular semi canals of of our inner e eats ears ls l's but to three main sensory sources These Theo arc are the tho aforesaid canals our eyes and the pressure sense which is a combination of impressions received from our vertebrae vertebrae ver ver- th the muscles o of ot our b backs and necks and tho the weight of our Internal organs Dr Percy Fridenburg the ophthalmic mic surgeon 01 ot Lebanon Hospital and junior surgeon of oC the New York Eye and Ear Infirmary points out in the Journal of or the tho American Medical AssocIation Association As As- that an au examination in equilibrium equi of or candidates for aviation that thatIs I IIi Is ii confined to their reaction to im on the thc nerves p of pf th the ears ars and that neglects the other two just as im important important im- im im-I im factors is not likely to save them from falls That dizziness may mar be produced solely b by sight is patent to eyer every one who has experienced It on looking down from a great height Dr Fridenberg Fridenberg Frid- Frid Illumination enberg says bays Irregular and motion of objects may cause caus dizziness and confusions as seen n In Inthe inthe the Hie common or field variety varlet of movie headache or dizziness A swinging I mirror mn may cause a most marked seasickness seasickness sea sea- sickness which Itself the classical example example ex ex- ample of vertigo Is often oCten resolved most effectively by br excluding visual visual impressions merely by closing tho the eyes of aviators who He lie quotes s narks rw-narks a into thick sa say that when they get clouds they thOY cannot tell teU whether hether tha are on a level loel a or not and urges that in iu the tho training of ot airmen their reactions reactions reactions to unusual visual conditions be observed carefully by their tors torn t |