In these days of laboratory methods it is refreshing to find that there is still room for pure clinical observation and that, from time to time, new signs of old conditions are brought forward. One often feels that in powers of clinical observation the old masters of medicine were far ahead of us, but possibly this is a mistaken idea due to the halo of glory with which we often surround remote occurrences. It is to be hoped that the occasional discovery of new signs will stimulate all practitioners to develop the powers of their unaided senses to the highest possible degree and to depend, to a lesser extent than is now usual, on extraneous instrumental aids.
About five years ago Grocco of Florence described a sign of pleural effusion which has attracted little attention in this country, but which seems worthy of serious consideration. The sign consists in the