. Practical points in the use of X-ray and high-frequency currents . Fig. 39.—Represents a modification of the Piffard tube. It is knownas the Cornell treatment tube. The main chamber B is made oflead glass. A is a soda glass window at the end which allows theX-rays to pass through it. This tube is very small and as used byDr. Albert Geyser, the soda glass window A is to be kept in perma-nent contact with the part to be treated. however, is generated at the wall of the tube incontact with the part to be treated. (See ) Caldwell Tube. This is another modifica-tion of the original Crookes
. Practical points in the use of X-ray and high-frequency currents . Fig. 39.—Represents a modification of the Piffard tube. It is knownas the Cornell treatment tube. The main chamber B is made oflead glass. A is a soda glass window at the end which allows theX-rays to pass through it. This tube is very small and as used byDr. Albert Geyser, the soda glass window A is to be kept in perma-nent contact with the part to be treated. however, is generated at the wall of the tube incontact with the part to be treated. (See ) Caldwell Tube. This is another modifica-tion of the original Crookes tube, and is intendedfor treating cavities. In place of the cathodestream striking on the glass, Doctor Caldwell had X-Ray Tubes 73 a piece of platinum sealed inside of the tube, sothat the cathode stream focusses on this Fig. 40.—Represents the English Derma tube, it being practically atype of the original Crookes tube, the X-rays being generated at theclosed end of the tube so that their penetration is very slight. a shield to cut off undesirable rays. Fis Owing to the heat generated, it has been foundnecessary to use an extra tube to cover this ex-tension and the under space filled with water,
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