They take a child, two or three years old, put him in a porcelain vase, more or less grotesque, which is made without top or bottom, to allow egress for the head and feet.

During the day the vase is set upright, and at night is laid down to allow the child to sleep.
Thus the child thickens without growing taller, filling up with his compressed flesh and distorted bones the reliefs in the vase.

This development in a bottle continues many years.

After a certain time it becomes irreparable.

When they consider that this is accomplished, and the monster made, they break the vase.