The human machine, its care and repair; or, How to develop the body, preserve the health, meet emergencies, nurse the sick, and treat disease; . portion of the seatcause undue pressure upon partsin one of the most delicate re-gions of the human better place this portion ofthe subject before the reader, wehave, in connection herewith,three illustrations—Figs. I, 2and 3. Fig. 1 represents the bonypelvis of the human being. Thetwo prominences marked A arethe ischial tuberosities uponwhich the weight of the bodywhen riding a wheel should exhibits the pubic arch,which protects a p
The human machine, its care and repair; or, How to develop the body, preserve the health, meet emergencies, nurse the sick, and treat disease; . portion of the seatcause undue pressure upon partsin one of the most delicate re-gions of the human better place this portion ofthe subject before the reader, wehave, in connection herewith,three illustrations—Figs. I, 2and 3. Fig. 1 represents the bonypelvis of the human being. Thetwo prominences marked A arethe ischial tuberosities uponwhich the weight of the bodywhen riding a wheel should exhibits the pubic arch,which protects a portion of theanatomy upon which the weightof the body should never rest, forany considerable time. The pubic arch is natures protectionfor some of the more delicate andsensitive parts, among which arethe prostate gland, the bulb, ure-thra, etc. Any condition whichshall interfere with natures ar-rangement will throw down thebars of protection, and sooner orlater result in permanent and se-rious injury. The insidious wayin which these injuries gain afoothold misleads the one be-ing injured ; and, while there maybe premonitory symptoms or. SANITATION. 43 warnings, they are not such as to be observed until too late, whenthe injury has occurred. Fig. 2 represents the bony pelvis seated upon the commonhammock saddle, the saddle against which we should will be seen that the weight of the body ceases to be supportedby the ischial tuberosities, but is supported by that portion of thebody called the perineum. Fig. 3 exhibits the bony pelvis resting upon a flat rigidseat, the weight of the body falling upon the two bony prominencesof the pelvis. The seat represented in this plate consists of twoseparate pads or cushions, between which is a groove or depres-sion, about one inch across, for the better protection of the peri-neum from pressure. Any bicycle seat made upon the plan ex-hibited in this plate will be less likely to cause injury to the delicateportions of the body situa
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidhumanmachineitsc00mcve
