Laws of Error in Drawing

Abstract

I SHOULD be obliged if you allow me to state in the next issue of NATURE, to prevent any misconception of the extent of those “compulsory errors” alluded to in my article printed in the current number, that I am able to specify such, with equal particularity, as they occur in the following additional figures, viz.:—The cylinder, the ringed cylinder, the oblong, the octagon, cone, hexagonal pyramid, octagonal pyramid, triangle (solid). Also in those figures framed of square-sectioned woodwork that have the following shapes, viz. square, cross, triangle, arch, hexagon, pentagon, circle. Again, that they are observable in all forms which are complexities of the primal forms above given; and, moreover, I have traced them clearly in the draughtsmanship of Orientals, and even in the drawing of the greatest painters.