She tucked the pencil in the spiral part of her tablet.
When they come to use the pencil in drawing, they already possess accuracy of eye and free command of the brush.
With uniformly illuminated objects it may happen that the pencil in the object-space may be limited before passing the object, either through the size of the source of light employed or through a diaphragm connected with the illuminating system.
17 shows a pencil in air, A, dispersing in water, W, from the semiaperture u 1, or a pencil in water dispersing in air from the semiaperture u2.
Instead of keeping a catalogue of the species contained in the herbarium, which, owing to the constant additions, would be almost impossible, such species are usually ticked off with a pencil in the systematic work which is followed in arranging them, so that by reference to this work it is possible to see at a glance whether the specimen sought is in the herbarium and what species are still wanted.