Another use for the blackboard in the Sunday-school is the drawing of maps and outlines of the location of sacred places. Teachers have found it difficult, however, if not impossible, to draw maps of the proper proportions and rightly to locate the places. The following simple plan, used by Ritter and Guyot, has been extensively used in our Sunday-school Conventions the last year or two, and found to be useful. It is called the "Relative Measurement" method. One line, say from A to B (see diagram on page 123), is taken as the unit of measurement. This line is 40 miles in length. Having drawn this line at the top or northern boundary of Palestine, next dot off five times forty miles south, and number it in proper proportions, 1, 2, 3, 4, 5. Then run three times forty miles west, and number 6, 7, and 8. Then draw a line from A, sloping to the figure 8, for the coast-line, and you have the general outline of Palestine. Then run another dotted line from A to 6, and you have the Jordan line. The River Jordan rises opposite 1. The Sea of Galilee lies opposite No. 2. The Dead Sea opposite 4 and 5. The principal mountains are designated as /\ H. for Hermon, etc. Cities by * and letters, as Jer. for Jerusalem, C. for Cæsarea, etc. (See table.) The great divisions are made by drawing a curved line from Mount Carmel to the Jordan, midway between 2 and 3. Then equidistant between 3 and 4 draw a circular line to the coast of the Mediterranean Sea. The length of the Holy Land is about 180 miles and the width from 25 to 70 miles. The Sea of Galilee is 12 miles long by 6 broad, and the Dead Sea is about 50 miles long. The following outline, which appeared in part in _The Sunday-School Teacher_, of Chicago, is a good illustration: _Table of Localities._ (_See Map._) /\ _Mountains._ * _Cities._ H-ermon. H-ebron. G-ilead. B-ethlehem. T-abor. Jer-usalem. P-isgah. J-ericho. C-armel. Jop-pa. E-bal. C-æsarea. G-erizim. Ca-pernaum. N-azareth. S-idon. T-yre. [Illustration: Map.] The foregoing are samples each of several classes of blackboard exercises, which I have selected as being the most practical. Other more fanciful ones are omitted, for it should ever be remembered that the true, legitimate use of the blackboard does not necessarily involve any of these ingenious devices: simply the plain Word of God, plainly written, is all. XV. THE INFANT-SCHOOL.