To paint narrow lines on a plate of glass such as is used for show signs, first clean the side of the glass to be lined with a few drops of ammonia in warm water; then polish with a piece of soft paper, and lay the glass flat. Mix the colour in turps. Dry colour ground in turps is best, bound with japan gold size; do not use more than loz. of gold size to lib. of colour. Put the colour on a piece of glass, and charge the lining pencil with the colour. Let the second linger rest on the edge of the glass as a guide; hold the pencil between finger and thumb, and draw your hand towards you. If only a few lines are to be painted, perhaps it would be better to use a sign-writer's brush, and, when the lines are quite dry, to cut them straight with a sti'aight-edge and sharp chisel. Lining pencils are made from sable hair, are from 2in. to 2 1/2in. long, and are called lark, crow, duck, goose, and swan, swan being the largest.