I experienced considerable difficulty in holding my lead shields in place when close shielding was desired. Duplast,1 a double-coated Elastoplast which is made of rubber, resins, zinc oxide, and wool fat, was used. The advantage of having adhesive on both surfaces proved satisfactory for the purpose desired; namely, with one adhesive surface pasted to the skin and the other to the shield, it was found that the shields would remain stationary and even, on occasion, the edges of the shield outlining the area of exposure could be held in close apposition to the skin. This proved especially advantageous around uneven surfaces, such as around the eyes, ears, and nose. The same preparation was also used with both the radium plaques and the radium moulds. If filtration was used, one layer of the Duplast was placed between the skin and the filter and another between the filter and the plaque