Farther back beyond the well was the engine room.
"Here's where I'm at home," said Matt, creeping into the engine room and turning on another incandescent light.
In one side were switchboards for the dynamotors, and near them were spiral resistance coils curving along the roof. Over on the other side was a trolley controller, which Matt knew must be used for speeding the vessel under water.
"Give the wheel of that diving engine a turn to the right, Dick," called Matt.
Dick obeyed the order. Matt turned the switch of the controller and then instantly there was a low, electrical hum and the Pom started toward the bottom.
"Get on the box under the conning tower, Dick," said Matt, "and do the steering."
"How'll I steer? There's no periscope."
"Steer by compass—there's one right in front of you as you stand in the tower."
"But what'll I do for light? We're under water and no daylight comes in at the lunettes."
Matt touched a switch, and electric light flooded the tower.