The President of the United States of America takes pleasure in presenting the Navy Cross to Pharmacist’s Mate First Class John Linso, United States Navy, for distinguished service in the line of his profession in connection with the preliminary stages of the development and testing of the submarine escape device known as the “Lung,” in 1931. With the final apparatus he made many test escapes. During one of these tests he was stricken with caisson disease 10 feet under water, was brought to the surface partly paralyzed, was unconscious before he could be placed in a recompression chamber four blocks away. When recompression had been given and a cure effected, he was eager to continue his tests. When the final tests were made in open water, he was lowered in a steel box to the bottom of the Potomac River in 102 feet of water off Morgantown, Maryland, and again in 155 feet of water off Solomons Islands, Maryland, where he assisted others to escape safely to the surface. So far as is known, no such tests as this series have been previously made. All the tests with preliminary design and tests with final apparatus required extraordinary coolness and courage, necessitating assumption of risks far beyond the call in line of duty. The hazards were eagerly accepted by Pharmacist’s Mate First Class Linso to the furtherance of this development, and his work in this connection contributed greatly to the final perfection of the apparatus.