The same surgeon, who speaks from good experience at Marlborough College, has found a lotion containing sulphurous acid very useful in "every kind of bruise and sprain." He recommends a spray of pure acid for six or seven minutes till the part feels cold, then lotion (1 in 8) to be applied and frequently changed; in forty-eight hours inflammation and pain have subsided, and on the third or fourth day the limb can be strapped or bandaged.