"Well, how goes it, dad?" asked the youth, as he deposited his bundle on a bench. "Do you think you can make it work?" "I think so, Tom. The positive and negative plates are giving me considerable trouble, though. But I guess we can solve the problem. Did you bring me the galvanometer?" "Yes, and all the other things," and the young inventor proceeded to take the articles from the bundles he carried. Mr. Swift looked them over carefully, while Tom walked about examining the submarine, for such was the queer craft that was contained in the shed. He noted that some progress had been made on it since he had left the seacoast several days before to make a trip to Shopton, in New York State, where the Swift home was located, after some tools and apparatus that his father wanted to obtain from his workshop there. "You and Mr. Jackson have put on several new plates," observed the lad after a pause. "Yes," admitted his father. "Garret and I weren't idle, were we, Garret?" and he nodded to the aged engineer, who had been in his employ for many years. "No; and I guess we'll soon have her in the water, Tom, now that you and Mr. Sharp are here to help us," replied Garret Jackson. "We ought to have Mr. Damon here to bless the submarine and his liver and collar buttons a few times," put in Mr. Sharp, who brought in another bundle. He referred to an eccentric individual who had recently made an airship voyage with himself and Tom, Mr. Damon's peculiarity being to use continually such expressions as: "Bless my soul! Bless my liver!" "Well, I'll be glad when we can make a trial trip," went on Tom. "I've traveled pretty fast on land with my motorcycle, and we certainly have hummed through the air. Now I want to see how it feels to scoot along under water." "Well, if everything goes well we'll be in position to make a trial trip inside of a month," remarked the aged inventor. "Look here, Mr. Sharp, I made a change in the steering gear, which I'd like you and Tom to consider." The three walked around to the rear of the odd-looking structure, if an object shaped like a cigar can be said to have a front and rear, and the inventor, his son, and the aeronaut were soon deep in a discussion of the technicalities connected with under-water navigation. A little later they went into the house, in response to a summons from the supper bell, vigorously rung by Mrs. Baggert. She was not fond of waiting with meals, and even the most serious problem of mechanics was, in her estimation, as nothing compared with having the soup get cold, or the possibility of not having the meat done to a turn.