These four pieces, when screwed together, form an ordinary stethoscope. When separated, it is intended that the two rods should be inserted transversely through the chestpiece and through the earpiece, so that the whole SALT & SON, stethoscope again appears in one piece, but so flat in be easily breast or The Medical times and gazette coat, thus the usual eying the the hat, frequently spoils the snape of that article of attire, or with the loss of the instrument by |