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A repetition of the two sides of the triangle [[image]] one reversed of the other [[image]] brings the pupil to the most simple form - the Square [[image]] - and until he can accomplish this form with some correctness, it is useless to proceed to others more difficult and complicated [[strikethrough]] forms [[/strikethrough]]. 

All forms contain [[strikethrough]] more or less [[/strikethrough]] much of the principle contained in the above - and with the addition of the circle, may then be said to be the essential principle of all forms for whatever may be the curvature of a line, its general direction is generally determined by a straight line, a curved or intricate line projected on the straight line as a direction, has the advantage of not losing its direction points, while following the intricacies of the curves.

The triangle [[image]] may be used as the foundation, or base of the [[strikethrough]] sides [[/strikethrough]] for our present purpose of the circle. Thus to enable the learner to draw a circle project the triangle thus [[image]]on this add the curved lines marked in dots and half the circle is obtained [[image]]. repeat this reverses and it completes the form. A few trials of this kind will enable the learner. to dispense with the guide lines, and draw the circle without their aid, . Having accomplished the drawing of the square. the eye may [[strikethrough]] be made [[/strikethrough]] should be accustomed to view this forms. when presented in the real object under different situations & aspects. cut the forms in thin wood trans then when seen above the line of the eye, also .when seen from above or looked down upon . . or edgewise, and the pupil will find that the eye rise by this practice become ,acquainted with the forms, and the changes they may present under different circumstances, and may then proceed to draw from the real objects. the Cube, and the Ball which will be found to contain [[strikethrough]] embraces [[/strikethrough]] with its perspective lines. & Light and Shadow.  [[strikethrough]]the whole fit[[/strikethrough]] the whole principle 
of form in its pristine simplicity.  the practice of showing these  [[strikethrough]]forums [[/strikethrough]] from the real object[[strikethrough]] source [[/strikethrough]]. & Drawing them in [[ChiaroScuro?]]; cannot^ and even is worth a hand of copies of elaborate points^ will be too often repeated, by one who is really desirous of educating his eye to the real appearance of objects & to the deceptive appearance {of rolundity ?} is one of the great embarrassment to young artists.  Almost all lives are subject to alteration from this relative position with regard also the spectator eye [[strikethrough]]example[[/strikethrough]], a Horizontal and perpendicular lines are the exceptions [[strikethrough]] and defend [[/strikethrough]]. the first being the line directly opposite the eye- as seen at sea. Where the water line rises until it reaches this point and then [[strikethrough]] was of no objects[[/strikethrough]]- in the boundary line of vision - and  line of [[checkup/]] or found strike. whatever may be its length.  nice if seem dually and wise ^ for much its point ^ before the eye be shortened ^ in appearance^ to a mere dot.. and for the reason that it then covers the actual point of sight, being the point on the horizon line directly opposite the observers eye.  .  this dream from the front intended to be at right angles to the horizon line [[?]] under perspective allemon[[?]] he found to converge and center in one point on the horizon line, and rise way again as seen from below that is above the eye.- or from above that is looking down. on the plain.    This. a short piece of hours. if held above the eye will present the appearance of the lines of its sides appearing to round down. and such is the case to this a point on the horizon line.