A new method for the rapid removal of plaster-of-paris casts utilizing sodium citrate as a solvent for calcium sulphate has recently been announced by Shelling and Cohen.1 A method for more efficient application of the solvent seems to be in order.
Various methods were tested out and the one here described was found to be the most efficient. The instrument is easily made at a very small cost and by actual test saves 50 per cent of the time used in applying the solvent by the method advocated by Shelling and Cohen.
MANUFACTURE OF INSTRUMENT
A flat piece of tin, 0.05 cm. in thickness and 9 by 7.5 cm., was secured. This was bent at the center to form an angle of 60 degrees, and a slit 0.2 cm. in width and 8 cm. in length was cut at the apex of this triangle. Next, two triangular pieces were cut and soldered into each end of