Popular science monthly . SPREADER Type of porcelain insulatorsThe insulators connected in series. LQftOINGCOIL SPARK Manner of connecting the several instrumentsmaking up the complete sending set If no water pipes are available, a largecopper or iron plate may be burieddeeply in moist cartii. As a rule,though, such earth connections are notas satisfactory as a pipe forming partof the town water system. Connecting the Set Theseveralinstruments mak-ing up the completesending set mustbe connected upas shown in Fig. spark-gapshould be adjustedwith its electrodesquite close together
Popular science monthly . SPREADER Type of porcelain insulatorsThe insulators connected in series. LQftOINGCOIL SPARK Manner of connecting the several instrumentsmaking up the complete sending set If no water pipes are available, a largecopper or iron plate may be burieddeeply in moist cartii. As a rule,though, such earth connections are notas satisfactory as a pipe forming partof the town water system. Connecting the Set Theseveralinstruments mak-ing up the completesending set mustbe connected upas shown in Fig. spark-gapshould be adjustedwith its electrodesquite close together?—never more thany^ in. apart and atleast half of theloading coil is to beput in series with the antenna. Unless alarge part of this coil is used the trans-mitter will not radiate pure, sharp waves,and its use will violate the law and makeits operator liable to prosecution by thegovernment. If the spark-gap is keptshort and a considerable portion of theloading coil used, there will be nothingto fear so long as neither of the aerialwires is over 75 ft. in length. Whenever thekey is pressed,
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
