116 METHODS OF COMMUNICATION FOR FOREST PROTECTION 



with a flat, brass hook at one end and a cord terminal at the other. The latter has a 

 cord terminal at each end. The total weight is 10 ounces. 



For use with the Adams hand set a similar connector may be made in the field 'of 

 emergency wire. A brass hook is easily improvised from the contact plates of a worn- 

 out 703 Ever Ready battery. 



Fig. 69 Forest ranger using the No. 1-A emergency kit 



The emergency connector, Northern Electric No. 311-D, used 011 some reserves, 

 is not as suitable as the new type, and this connector is no longer a, part of the standard 

 equipment. 



2 METHOD OF USE 



The No. 311-D connector is joined to the overhead wire by throwing one end over 

 and then pulling it along the wire until a contact is made at the bare place in the 

 centre of the connector. The two ends are both joined to the line terminal of the set 

 marked L. The short wire is then used to join the ground termmal marked G to the 

 ground rod. 



The standard connector is attached to the overhead wire by means of a short pole. 

 Generally, any light pole about 10 or 12 ft. long, cut as needed, is sufficient. To the 

 tip the end of the connector bearing the hook is attached, so that the hook projects a 

 few inches above the pole and the rest of the connector is wound around the pole in a 

 long spiral. It is then hooked over the wire and allowe,d to swing loose, the weight of 

 the pole serving to ensure a good contact The end bearing the cord terminal is joined 

 to the line post of the instrument, the short wire connects the ground post to the ground 

 rod. The whole operation is performed in a couple of minutes. With metallic circuits 

 two connectors must be used, but the ground wire is unnecessary. 



3 TEMPORARY GROUNDS 



The importance of extreme care in locating permanent grounds has already been 

 emphasized. Ear less care is required for a temporary ground connection. Although 

 it is true that except in very dry regions, or in the winter in the north, a workable 

 ground for a temporary connection can be ebtained almost anywhere, yet it is always 



