Hatching the Pot by James McMullan

Line by Line is about rediscovering the lost skill and singular pleasure of drawing.

 "In the last column, I discussed ellipses and how drawing them involves the fluid, fairly fast movement of the hand, letting your reflexes carry out the kind of rounded shape you intend to make. Now we’ll move on to shading the pot that we previously described in simple outline, using curving lines that are like segments of the ellipse."
Hatching the Pot - NYTimes.com/read more