Show Aviation 4 r 4 Sickness I TT IT T follows naturally thru that after tho the A adoption of oC flying o on a scale cale morbid marble manifestations peculiar to the change of oC meteorological conditions to which those thoo who travel through the theair theair theair air at varying altitudes and at great reat speed are aro subjected should bo be the subjects of or medica study ay 8 a writer In the Medical Record in the tir liNt first instance instance- In the case caso of those who take part pait In the ver very or at excitement of or guiding and managing managIng an aeroplane there must i be great er t stress placed upon the nervous st m. m more probably greater than in an any of oC the strenuous pursuits pursuit not even r excepting ex- ex automobile racing to Which the present generation Is so O prone proM but this aspect of or the matter Is foreIgn X th the e present d discussion In the to Medical Press and Circular reference l Is iV rS made to a n. communication b by Crouchet nm and Moul to th the French Academic Academia des dea Sciences as a result of their a lions on several s aviators l who took In tho the Bordeaux Bot contest part According to these observers ver there thera are arc two kinds of at troubles trouble from which aviators suffer The first is due to ho tho a altitude attained the second to the ph physical effort put forth Corth The special 1 factors actors of or the altitude question ar are difference in pressure arid and difference In the chemical compo composition of ot tho the air all Of or course the tho difference In pressure pressure pres pres- sure Is Iser er very ery considerable and the dif dif dif- ference in chemical compo composition of or th thA air all Is also quite marked at great gnat height heights and further there Is the dif die terel ference CC in the temperature There ar are however cr in the case of aviators two er very special adverse o factors to which Crouchet and attach great Importance namely the Tepidity rapidity ofle of the le a ascension c and still more the ranta- ranta It ity O or Of the descent The speed peed of tho ascent nt Is very ery great but b the rapidity of oC tho the descent Is fantastic atm nna almost gruesome Tho The biplane and monoplane differ somewhat with re regard regard re re- gard to the speed of or ascension but th the rate of oC descent is about the same ume for both So far ar as the ascent ascent Is concern concerned d respiration becomes shorter when a a. height of or 1500 meter has b been n reached and increases ses Nausea is not a symptom but an un- un definable kind of malaise Is present A As M for Cor tho the phenomena a sll slight ht deafness is e experienced at the height of at 1000 meters at tit a somewhat greater height noises in tho the cars ears com corn mence monce Vision re remains ma Inn Intact Th The Tho following are some of tho the other sensations sen sen- which have ha been remarked Headache sensation of cold above 2000 2000 2000 2 meters feet teet the movements movements move move- ments month of ot tho the body are bru brusque que and Jerky Tho The morbid phenomena which I distinguish tho the descent are chiefly these A sensation of at anguish like that which accompanies the sudden descent descent de de- de I scent of at an elevator violent palpitations and greatly Increased noises in inthe inthe inthe the ear ears The most characteristic of ot all the troubles are arc a a. burning sensation ofte e face and disagreeable of or the eyes ees with an almost Irresistible desire to sl p. p On landing the aviator Is not free tree from tram the above sensations for a a. considerable time Respiration quickly returns to normal but arterial hypertension Is jg still well marked and I persists for quite a long period after atler the flight is finished S As ma may be Imagined e explanations of oC these phenomena differ as ns much as the phenomena themselves differ Evident roles ma may be attributed to variations of at t temperature the cold speed and so forth With regard to the troubles of oC circulation the tho authors are of or tho the opinion that the cause may be sought In the rapidity with which the human organism passes through the different conditions of or atmospheric pressure though It Is not reasonable to exclude altogether the nervous element |