h;!» 



can be put in the series for this purpose. The needle \v;is ;i(tii<lieil tn :in 

 electric wire about 2 meters lonjj and could lliiis l>e used ;it mii.v poiid 

 about the work taltle or luuij; up out of the w.i.v when not in use. 'I'lie 

 use of a warniiufj ueedh^ of this kind is much more (diivenieid tliiui I lie 

 ohl method generally used and more rapid. 



