"What other things?" asked Alfred.
"Well, bomb-dropping for one thing; then, some machines are better adapted than others for directing artillery fire, or for using machine guns," said the lieutenant.
"The captain has a Caudron," said Alfred, "and he doesn't use a gun on it either."
"No; the Caudron is admirably adapted for observations, and is used almost wholly in France for directing artillery fire," answered the lieutenant.
"It seems to me that this machine is good for observing," said Ralph.
"Yes; and it is used for that purpose, but it is now being put to use for photographing purposes,—that is, most of the Maurice Farman types are so used," answered the lieutenant.
"Why is that?" asked Alfred.
"For two reasons; first, because you will see we can get a good view downward; and, second, because it is the most stable machine in flight, the latter making it especially well adapted to take good views," replied the lieutenant.
"Which are the largest ships?" asked Ralph.
"The Voisin and the Breguet, by all means. They are able to carry heavy loads, and are used as bomb-dropping machines, as their fuselages are especially well adapted to carry and release the missiles," said the lieutenant.