If the thickness be varied from the entering to the trailing edge the greatest thickness should be towards the former.
Now stand in front of it and line up the leading edge with the main spar, rear spar, and trailing edge.
Back toward the trailing edge then, to a small escape-hatch beside which was fastened a dull black ball.
And if both be curved as in Fig. 29, then the concave edge must be the trailing edge.
Halfway back, one of them stumbled forward and caught at the trailing edge of his robe.
That hinged movable auxiliary surface on the trailing edge of the wing is an aileron.
The flippers and the trailing edge of the flukes are darker than the rest of the body.