<span>"His historical researches, however, did not lie so much among books as among men; for the former are lamentably scanty on his favorite topics; whereas he found the old burghers, and still more their wives, rich in that legendary lore, so invaluable to true history. Whenever, therefore, he happened upon a genuine Dutch family, snugly shut up in its low-roofed farmhouse, under a spreading sycamore, he looked upon it as a little clasped volume of black-letter,' and studied it with the zeal of a book-worm.""Rip Van Winkle," 1994 edition, 1-2 </span>
The type of appeal presented in the passage is logos.
Explanation:
Logos is a type of rhetorical appeal that uses logic in order to convince the audience of something. Thus, the speaker or writer walks the audience through his ideas and evidence to the logical conclusion derived from them.
In this case, the writer affirms people must conserve water during a drought. Then, he moves on to say what people can do to save water, finishing with a convincing number: 1,000 gallons a year. What he did is show evidence of how effective the instructions he gave are. Logically, if they are effective, there is no reason to not follow them. Quite the contrary, since the evidence shows effectiveness, the audience will most likely start doing those actions.