Constructive work; . ) and braced one against theother. This forces the clay to a bell shaped mass as shown toright of Fig. XXVII. To keep the hands free from sticky clay, while the proc-ess of centering is going on, a pan of water, in which thehands are often rinsed, is placed on the machine a little tothe right. By this means the clay moves more freely be-tween the hands. When the clay is truly centered and while the disk stillrevolves place two fingers of the right hand on the top ofthe centered lump of clay. (See left of Fig. XVIIL) Thisflattens it just a little. Force the thumb of the lef
Constructive work; . ) and braced one against theother. This forces the clay to a bell shaped mass as shown toright of Fig. XXVII. To keep the hands free from sticky clay, while the proc-ess of centering is going on, a pan of water, in which thehands are often rinsed, is placed on the machine a little tothe right. By this means the clay moves more freely be-tween the hands. When the clay is truly centered and while the disk stillrevolves place two fingers of the right hand on the top ofthe centered lump of clay. (See left of Fig. XVIIL) Thisflattens it just a little. Force the thumb of the left hand onto the flattened surface while the fingers are still there. This makes an impression that deepens in proportion to thepressure of the thumb and fingers. The revolving form con-tinues to move between the thumb and fingers of the lefthand. Both hands are used in the shaping of the form,but the left is always held so as tO keep the upper edg; the form regular. The right of Fig. XXVIII shows com-pleted FIGURE XXVIII. Any clay may be used that will bear firing. Experiment and practice along this line gives one the abil-ity in a very short time to turn out a great variety of forms. When handles are desired they must be moulded by handand placed in the desired position while the pottery itself isstill moist or green, as it is called by potters. *Slip is used when placing the handles very much as glueis used in the case of wood. When the pieces thus far completed are thoroughly drvthey are fired. After this firing a glaze is poured over theentire form and the piece is again fired. For beginners it is well to purchase the prepared glazes. Much of the very best pottery, even when fired lor thelast time, still is not water proof. To prevent percolationcoat the inside with shellac. To do othis pour the shellac into the vase and when everypart of the inner surface has been touched, pour out theresidue. 244 MAKING OF SIMPLE APPARATUS. In the exercises which follow an effo
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