The Hemisphere Globe, represented at figure 12, is also an important aid in the study of Geography.

The use of Outline Maps, and the practice of Mapdrawing, will be found a sure means of rendering the knowledge acquired of geography, distinct, correct, and permanent, without which, time spent in its study is hardly better than thrown away.

The Tellurian, which is represented at Fig. 13, furnishes better and clearer illustrations than can otherwise be given of many interesting and important phenomena, among which are the sucession of day and night; the changes of the seasons; the varying length of days and nights at dif ferent seasons of the year; the rising of the Sun north of east, and its setting north of west, in the Summer, and its rising and setting south of these points in the Winter; the changes of the Moon; solar and lunar eclipses; spring and neap tides; the later daily recurrence of the tides; the length of days on the Moon; the appearance of the Earth to observers on the Moon; the Harvest Moon; and the difference between a solar and the siderial year. All of these, and other phenomena, may be explained by the use of the Tellurian, or Season Machine, as it is sometimes called, with a clearness and simplicity that bring them within the comprehension of children.

Some persons may be inclined to regard the suggestions here given as theoretical, and even visionary, and may wonder why the Superintendent, in an official document, does not restrict himself to things practical. Such persons may regard it the exclusive office of a practical education to teach the art of increasing material riches-of gathering shining dollars. But I regard that practical which awakens bright thoughts, which elevates the affections, which entertains the imagination, which widens and hightens the range of reflection, and which renders frail mortals more appreciative and more worthy children of our Father in Heaven. Shall we not, then, regard that practical which gives a rational idea of a plurality of worlds; which teaches that many of the stars of heaven are worlds like our own, with days, and nights, and changing seasons, and some of them several hundred times larger than our Earth, and all of them probably inhabited by rational and intelligent beings; which teaches, also, that other stars are, like our Sun, centers to other Systems, like our Solar System; and all, it may be, retained in their position by one common law, which may be taught to

children; shall we not, I say, regard such teachings practical?

Or shall we suffer our children to become men and women physically, though babes mentally, holding, as some of their fathers and mothers do, the unworthy opinion that the stars of Heaven are merely tiny lights for no useful purpose, and only occasionally visible; or that, at best, they are eye holes through which God looks down to see what naughty children and wicked men do; himself a great spy, secreted behind the thick curtain of night?

I need not say, such thoughts are degrading to humanity, and unworthy of the beneficent Father of us all. We need, then, the Orrery, represented by Fig. 14, which will aid us and our children in comprehending the annual revolutions of the sisterhood of planets, and the magnificent machinery of the Solar System. This instrument, thus becomes one of the most practical inventions of this, or of any age. It costs $12 00 to $15 00, according to the style of manufacture.

Section 23, of the Primary School Law, provides that Districts may raise money by tax for the purchase of globes, outline maps, and apparatus for illustrating the principles of astronomy, natural philosophy, agricultural chemistry, and the mechanic arts.

The Celestial Sphere represents the Earth, (a,) surrounded by the heavens, and indicates the Celestial Meridians, (d, d,) the Equator, (f) and the Zodiac, (e.) It also represents the poles of the heavens, which are simply the poles of the Earth extended. The Zodiac is divided into twelve equal parts, representing the twelve signs. Its lower edge is marked with degrees; and on its upper edge months and days are indicated. The axis (g.) may be inclined to any angle desired, by loosening the thumb-screw, (c) as represented at 2 and 3.

By means of this instrument, the real horizon of any place on the globe may be shown; also the lengths of the

days and nights on any part of the earth, and at any season. The time of the rising and setting of the sun, and the sun's appearance at the Foles, and his place in the Ecliptic on any day of the year, may likewise be illustrated by it. The Celestial Sphere may be obtained at a cost of $8 00 to $12 00.

School officers and others desirous of procuring any or all of the articles of School Apparatus here illustrated, will find the address of parties through whose agency the same, and improved articles of Apparatus generally, may be obtained, at the 404th page of this volume. They may