. A Reference handbook of the medical sciences embracing the entire range of scientific and practical medicine and allied science . Open. ZA I Fig. Case, Packed and Folded. rather than the actual weight of a soldiers necessaryequipment that is trying the man. His respirationshould not be impeded, the vessels and nervesshould be free from pressure, and the back should be ex-posed to the air as nuich as possible to facilitate evapo-ration. The nearer the load lies to the centre of gravity,the more easily it is managed. These various require-ments have been most nearly a
. A Reference handbook of the medical sciences embracing the entire range of scientific and practical medicine and allied science . Open. ZA I Fig. Case, Packed and Folded. rather than the actual weight of a soldiers necessaryequipment that is trying the man. His respirationshould not be impeded, the vessels and nervesshould be free from pressure, and the back should be ex-posed to the air as nuich as possible to facilitate evapo-ration. The nearer the load lies to the centre of gravity,the more easily it is managed. These various require-ments have been most nearly attained by an equipmentdevised some years ago by Brigadier General Merriam,which in brief may be described thus: The pack consists of two compartments and Is designedfor necessary underclothing, rations, and extra ammuni-tit>n within, and for a lilanket, a shelter-tent half, and, onoccasion, an overcoat on the outside. It is carried in partby straps passing over the shoulders and hooking into thewaist belt, but chiefly by two wooden supports that slipinto sockets on a lower half-belt and rest against the hip skml&sirc. supporfmea/ canside i/aA?hfs/rap can/e&n•^ip strap Fig. 3:J43.—Merriam Pack, shiWint^ Particulars. bones. The supports by their inclination keep the bur-den away from the back, so that ventilation is main-tained. To insure this the contents of the pack must bearranged so as not to bulge and press against the body. The waist belt does not require to be tight, but, if de-sired, may be left unbuckled while marching. Theweight is supported by the hips with some assistancefrom the collar bones, and there is practically no press-ure u]ion tlie back andabsoluteh none up(5nthe breast. This avoidsall constriction of thechest and of the arm-pits, which is the greatevil in the ordinarymethods of supports are in-t e rc h a n g ea b 1 e andwhen joiueil form ashelter-tent pole. It isintended to carry ashelter-tent half and ablanket rolled over thetop and si
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