Those who appreciate the good qualities of the Schreiber needle in meeting the difficulties of intravenous injection technic will appreciate the serviceability of the device here illustrated, which has been in use in my service for several months. The Schreiber needle is made in only one, or at most two sizes. This adapter makes possible the use of a needle of any size desired to meet the indications in a particular case. The needle proper is attached to the standard Luer hub of the adapter, and adapter and needle are then used together as one instrument, in accordance with a technic that I have already described.1The device was developed in cooperation with Mr. P. L. Pinkerton of the Precious Metals Tempering Company, who submitted a sketch and later a specimen for clinical trial. Whenever, for any reason, it is found necessary to inject amounts of solution too large