_Locating objects on the map._--The corner of the school-house containing the corner stone should be taken as the starting point. If there is no corner stone, select the most convenient corner. Put the school-house on the map anywhere you wish; probably the center of the map would be the best place. In the sample map the University is not in the center, as it was desired to show more of the country to the south and west than to the north and east. The map should of course be made like other maps, so it will be necessary to know the four cardinal points of the compass before locating anything on it. Perhaps the school-house has been placed facing exactly north and south or east and west, that is, arranged with the cardinal points of the compass; if so, it will be the best guide. If you are not sure, determine with a compass. With it the points can be determined very accurately. Having determined the points of compass, commence to locate objects in the landscape on the map as follows: Get their direction from the starting point at the corner of the school-house, then measure the distance accurately by running a bicycle on which is a cyclometer, straight between the starting point and the object. The cyclometer will record the distance accurately and it can be read off easily. If no bicycle with a cyclometer is available, one can use a long measuring stick, a tape measure or even a measured string; but the bicycle and cyclometer are more convenient and accurate, especially when the distances are considerable. Suppose the distance is found to be one-sixth of a mile due west. It should be located two inches west of the corner taken as the starting point. If the direction were south-west, then the two inches would be measured on the map in that direction and located accordingly. Proceed in this way for locating any pond or marsh, forest or glen. Now, when the places are located on the map, you can see how easy it would be for any one to find the places themselves. While the exact position should be determined if possible and located, one does not often take a bee-line in visiting them, but goes in roads, often a long distance around. In locating the objects on the map, every effort should be made to get them accurately placed, and this can be done most easily by knowing the distances in a straight line. It is hoped that every school in the state will begin this year making a natural history survey and a map of the region around its school-house. The map will show but few locations, perhaps, but it can be added to from year to year, just as the University map has been added to; and finally each school will have a map and notes showing exactly where the toads lay their eggs, where fish and birds are; and where the newts and salamanders, the different trees and flowers, rocks and fossils may be found.