STABLE MANURES 51 



truck farms and there pumped into large reservoirs, 

 which are provided with double gates. When loading 

 on the wagons, which are backed up to the spouts of the 

 reservoirs, the outer gate is first closed and the inner 

 gate opened. The space between the two gates holds a 

 wagon load. When this space is filled, the inner gate is 



FIG. IO. NIGHT SOIL TANK-WAGON USED NEAR BALTIMORE 



closed and the outer gate opened and the material is then 

 conducted into the wagons, provided with tanks that are 

 closed tightly when the wagon is in motion. In distribut- 

 ing over the field the end gate to the tank is raised by a 

 lever operated by the driver, and the watery material is 

 then spread over the slanting tail-board. Figure 10 shows 

 the style of wagon used on the Patapsco Neck near Balti- 



