The question with which this article is concerned is one that was under discussion, in the Ornithology Class at Iowa Wesleyan College. The original problem was to discover how many pairs of Baltimore orioles nest yearly in the town of Mount Pleasant where the college is located. As the investigation was carried on and interest deepened, the scope of the problem was enlarged somewhat to include a study of the determining factors in an oriole\u27s selection of a nesting place. When the problem was first undertaken, the town, which has a population of about four thousand and covers an area of one and one-fourth square miles, was divided into six districts of about equal extent and two students were appointed to search each district for orioles\u27 nests and to note the species of tree in which they were found. This work was done in February, and, as there were no leaves on the trees, each swinging pouch was quite conspicuous and the matter was not one of great difficulty
