. Teachers' manual for the Prang course in drawing for graded schools, books 1-6 . level. The classmay like to vote on thecomparative merits of thetwo sets of sketches, andto repeat, — on the draw-ing-book page, — the studywhich has given the moreinteresting and pleasing ef-fect on paper. Supplementarysketches, made outsideschool hours, may be ofgreat value in this connec-tion. If pupils can beinterested in making quicksketches of conic objects in different positions as seen at home and on the way to school, their powers,both of observation and expression will be found growing fast. In towns w
. Teachers' manual for the Prang course in drawing for graded schools, books 1-6 . level. The classmay like to vote on thecomparative merits of thetwo sets of sketches, andto repeat, — on the draw-ing-book page, — the studywhich has given the moreinteresting and pleasing ef-fect on paper. Supplementarysketches, made outsideschool hours, may be ofgreat value in this connec-tion. If pupils can beinterested in making quicksketches of conic objects in different positions as seen at home and on the way to school, their powers,both of observation and expression will be found growing fast. In towns whereelectricity is used for lighting the streets, conic reflectors may often be studied atdifferent heights. Many of the glass shades used on gas burners and electroliers areconic in form and easily studied. In examining and criticising these sketches the teacher will of course have tofigure to herself as clearly as possible (from memory or imagination or both) theprobable appearance of the objects drawn, remembering the following general prin-ciples that always hold true :. 1. A face view of a circle is always a circle. 2. An edge view of a circle is always a straight A circle seen oblitjuely ahvays appears like an ellipse. 4. The more obliquely the circle is seen, the more nearly the ellipse approaches astraight line. J. The less obliquely the circle is seen, the more nearly the ellipse approaches a circle. ii6 TEACHERS MANUAL. [book iv. SPECIAL EXERCISE. Construction. Making a Hollow Cone. On page A at the beginning of drawing-book No. 4 there is printed the patternof a liollow cone. Have pupils provided with scissors and strong mucilage or Hquid glue. It maybe found better not to actually distribute supplies of glue until after all the cutting isdone. When needed a few drops can be dropped on a bit of waste paper on eachpupils desk. A common wooden toothpick or a rolled up spill of .waste paper ofthe diameter of a slate pencil will answer nicely instead of a bru
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