88 



METHODS OF COMMUNICATION FOR FOREST PROTECTION 

 3 TESTING 



For battery testing an Ever Ready, No. 1003 battery gauge is a cheap and fairly 

 efficient instrument, and each forest reserve headquarters should be provided with one. 

 Cells which test less than 10 amperes should not be accepted. 'Cells showing less than 

 4 amperes at the end of a one-minute test should be discarded. First-class Blue Bell, 

 Blue Label, or Northern Electric cells when new may be expected to show 14 amperes 

 on test; Columbia, 24 amperes. 



4 REMOVAL FROM UNUSED STATIONS 



Always remove the battery from the telephone in stations that are to be left 

 unoccupied over winter, also from all outdoor sets. If left in the instrument consider- 

 able damage may result from leakage of chemicals. This is particularly true with the 

 1336-J set in which the battery is immediately adjacent to the generator. 



Section 72 Protectors 



The question of protection is a very important matter and is divided into two 

 classes in Forestry Branch work: (a) partially exposed substations and (Z>) fully 

 exposed substations. 



Porce/ain tube sloping 

 upwards from outside 

 through wa/lofbui/ding 

 as shown 



fi 



To //ne /er/n/nal\ 

 of profecfor 



Protector [".] 



/nstde ofbui/ding 



Telephone set 



/*? B &S rubber covered 

 bra/ded and wealherproofed 



*+/ 2 Porce/a,n Knob C0flper " /re 

 (Use insulated wire for ty/ng) 



Line 



*nd of /me w/re /eft 

 fong enough after dead 

 ending fo be brought 

 back on rfse/f doi*n to 

 fuse <?* shown 



Hang fuse /ow enough fo beeasi/y 

 accessib/e for reptecemenf 



Shown for one wire 'fine fg rounded 

 cf'rcu/f) fo//ow same method for? 

 meta/Sic circuit; 



Method of installing line fuse when required 



