Popular science monthly . ansmitting and receivingstation will be given. The manipulationof the apparatus, the methods of callingand answering and of sending messages,as well as the construction and ijst jfthe antenna change-over and the detec-tor-])rotecting switches will he remaining instruments needed forthe receiver are even easier to constructthan the detector and condenser out-lined here. It would be a good planfor the experimenter to complete (as described last month)now and ihe apparatus shown in thisarticle, so that he will be all ready toput his station
Popular science monthly . ansmitting and receivingstation will be given. The manipulationof the apparatus, the methods of callingand answering and of sending messages,as well as the construction and ijst jfthe antenna change-over and the detec-tor-])rotecting switches will he remaining instruments needed forthe receiver are even easier to constructthan the detector and condenser out-lined here. It would be a good planfor the experimenter to complete (as described last month)now and ihe apparatus shown in thisarticle, so that he will be all ready toput his station into complete operationsoon after the appearance of the nextarticle. It should be remembered thatfor exchange of messages between twostations it will be necessary to build twoof each of the instruments <lescribed, sothat each station may be completelyequipped aiul thus prepared both forsending and for receiving. A Caring for Storage-Batteries onAutomobiles WKAK or exhausted battery willcause misfiring in an engine, be-. Adding luw solutionor water to a weak stor-age battery cell to testthe specific gravity cause the current voltage is notsullicient to make a good hotspark jump across the battery becomes weak, , because of some resulting from short-<ir-1 iiiling, due to the C(jllecti(jn of sediment, destruction of insulation andthe bucklingof the plates; or, perhaps toolittle attention is given to the rechargingre(|uirements which vary with the use ofthe car. It is I)est to anahze the char-acter of the driving before finding faultwith the lialtcry to see if a too greatdemand has been made upon it. Adoctor or a city salesman, making manystops, will consume more current thanthe battery will stand, ilue to the fre-(|uent cranking. Continued use of a carat night will place an added burden ontlie battery to light the lamjis, which,may e(|ual or exceed the output of thdgenerator going at the speed one tra\clslat night. Under these conditions a!
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
