The POPULAR EDUCATOR is published in Weekly Numbers—the Common Edition, 1d.; the Fine Paper, 1½d. each. Also, in Monthly Parts—Fine Edition, without the Weekly Headings, 7d., or if Five Numbers, 8½d.; Common Edition, with the Weekly Headings, 5d., or when Five Numbers, 6d. each. =IMPORTANT ANNOUNCEMENT TO THE READERS AND STUDENTS OF THE “POPULAR EDUCATOR.”= A SERIES OF LESSONS ON DRAWING has just been commenced, which in their course will include the numerous branches of this beautiful art, namely, the Human Figure, Architecture, Landscape, Animals, Machinery, &c. The publication of these Lessons will entail a considerable weekly cost; as it will include not merely the engagement of an eminent artist and teacher to furnish the Lessons, but a heavy outlay for Engravings and Diagrams to illustrate those Lessons. JOHN CASSELL can confidently appeal to the readers of the POPULAR EDUCATOR as to the liberality with which this work has hitherto been conducted. The contributions by the eminent gentlemen who furnish the various Lessons, coupled with the editing, involves a weekly outlay, the mention of the amount of which would excite the astonishment of readers and students. And to this outlay must be added, still further, the Maps, and the numerous Engravings with which the Lessons are illustrated. We are not disposed to utter one word of complaint; but we do trust that while we are thus labouring to place within the reach of our students and readers, every branch of valuable instruction, regardless of cost—including several that could not be obtained but at a heavy expense for books, &c.—we do hope, we say, that our friends will strengthen our hands by using every possible means of enlarging the circle of our patrons. There is not one of our Subscribers who does not possess influence sufficient to obtain at least one additional Subscriber; let that influence be exerted, and he will not only strengthen and enrich the medium of instruction for himself, but will be the means of diffusing the blessings of education to others. We confidently look forward to a considerable increase of Subscribers from the date of this announcement. Price 1s. in stiff covers, or 1s. 6d. neat cloth. THE ELEMENTS OF GEOMETRY; Or the FIRST SIX BOOKS, with the ELEVENTH and TWELFTH, of EUCLID. From the Text of ROBERT SIMSON, M.D., Emeritus Professor of Mathematics in the University of Glasgow; with Corrections, Annotations, and Exercises, by ROBERT WALLACE, A.M., of the same University, and Collegiate Tutor of the University of London. Price 3d., in a convenient size for the Pocket, THE SELF AND CLASS EXAMINER IN EUCLID; Containing the Enunciations of all the Propositions and Corollaries in Cassell’s Edition. For the use of Colleges, Schools, and Private Students. Price 1s. in stiff covers, or 1s. 6d. neat cloth,