EDUCATIONAL.
E. A. T.—There is a School of Telegraphy in Moorgate-buildings, at the back of Telegraph-street, E.C. All candidates for free admission must have passed an examination in handwriting and the first four rules of arithmetic under the Civil Service Commissioners, in Cannon-row, W.C., aged not under fourteen nor over eighteen years. They must be gifted with quickness of eye and ear and a delicate touch. In three or four months they have acquired the art, working four hours a day. They must be proficient in the use of four instruments. The pupils in this school are only intended for service in London.
Cedrica.—In reference to Gall's or Mercator's projection, you may perceive that by doing away with perspective you obtain the relative distances, as well as the height of the mountains compared with the general surface, without deducting through foreshortening. You write fairly well, but too large to be pretty.
Sine.—The auroræ are closely connected with the earth's magnetism, although their exact relationship is unknown. The appearance takes place equally round both magnetic poles. The most general opinion seems to be that they are illuminations of the lines of force which undoubtedly circulate round our earth. At all events, the corona forms itself round the magnetic poles, and its lines correspond to the earth's magnetic field. Displays of auroræ are almost always accompanied by magnetic storms, which so much affect our telegraph instruments, although the latter may occur when there is no visible aurora. An artificial aurora was produced by electrical means by Professor Lindstroem, in 67° north latitude, which was found to exhibit the spectrum of the true aurora. You will find all information respecting the "Zodiacal light" in "Guillemin on the Heavens."
C. H. C.—No examinations are required for teachers in high schools; but of course preference is always given to those who have passed examinations, and they obtain better salaries. The senior or the higher Cambridge examinations for women would be the best, and would ensure a good position.