Popular science monthly . le the mothis iloing the work abouI he house, or at the timeof her shopping tonOne of the features (the device is that wheit is used both arms (ihe person carrying th{ hild are practical!free to tlo other thingAnother point which isimportant is thatby its use theshoulders and backare forced to take theWLight of the child,rather than thearms. FracticalUno etTort is needecto carry the aver-age baby. Withthis tlevice in usethe go-cart may beleft at home, whileon rain\- ila\s the infants feet need not i)eprrmilled to toucii the pavement. The de\ice may be used with ecjual
Popular science monthly . le the mothis iloing the work abouI he house, or at the timeof her shopping tonOne of the features (the device is that wheit is used both arms (ihe person carrying th{ hild are practical!free to tlo other thingAnother point which isimportant is thatby its use theshoulders and backare forced to take theWLight of the child,rather than thearms. FracticalUno etTort is needecto carry the aver-age baby. Withthis tlevice in usethe go-cart may beleft at home, whileon rain\- ila\s the infants feet need not i)eprrmilled to toucii the pavement. The de\ice may be used with ecjual com-fort either upon or beneath the outside(lothing. The part of the carrier whichholds the baby may be attached to anddetached from the shoulder harness inail instant, the basket section being sosmall that it takes up no more room thana good-sized handkerchief when rolled upand jilaced in the purse or is of a fabric material and is ad-justable to any size. Manual & Contrctled Manual Block Signets A-. With this carrier the shoulders and backare forced to take the weight of the child Daylight Lamp Signals Will Take the Place of SemaphoresNEW system of signaling which dis-penses with semaphores and coloredlamps has been adopted on theiVmisyhania Railroad. All indi-cations, both by day and by night, are given by rows of white lightscorresponding with the positions ofsemaphore arms. The system hasin use for more than eighteenmonths on the twenty-mileline from Philadelphia toPaoli. This line has fourtracks and it is one ofthe latest examples of rail-way electrification. Thereis hea\y suburban andgeneral traffic and theblocks are three to fourthousand feet in length. In 1914, Dr. Churchdisco\ered the possibilityf securing long range from amall lamp arranged in thexact focal center of a smallide-angle lens. Following thisml in conjunction with Mr. , Signal Engineer ofhe Pennsyhania Railroad, theew signaling system was de-cloped, in which separate lightunits arr
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
