Schiff has, within the past twelve months, stated that beginners in this mode of treatment should proceed in a different manner than the more experienced. This statement alone from such an authority shows the unsatisfactory state of affairs. Other writers have attempted to formulate rules, but none have been universally accepted.
THE PREPARATION OF THE PATIENT.
To begin with : how are the surrounding healthy parts of the area to be put under treatment to be protected from the action of the x-rays? Rollins devised a box in which the tube is enclosed. This is coated on the inside with heavy lead paint and has a diaphragm of changeable size, so that the size of the cone of x-rays passing to the outside may be regulated. This contrivance is used but very little, probably partly on account of its cumbersomeness. As the surrounding healthy parts