USE OF LABOR-SAVING APPARATUS 



69 



can be used behind the Ford truck to transport the supplies and tools 

 necessary in connection with isolated jobs. 



Trenching Machines 



Where it is necessary to do a considerable amount of trenching for 

 underground conduit in outlying districts, it is sometimes possible to 

 utilize a trenching machine with marked economy. In fact under 

 normal conditions a machine of this kind will dig trench about as fast 

 as a gang of 50 men. 



The machine shown in Fig. 16 is a recent development which has 

 advantages over the older type units in that the size and weight are 

 such as to admit of its being transported from point to point on a 

 heavy truck or trailer. 



Pumps 



In handling the water from excavations and also from manholes 

 where splicers are working, the diaphragm pump illustrated in Fig. 17 

 is giving a good account of itself, particularly because of certain 

 features incorporated in the design which especially adapt it to tele- 

 phone conditions. 



Fig. 17 — Enclosed Discharge Diaphragm Pump. Capacity One Barrel per Minute 



