_Chaplain._—A silver Latin cross one inch high. The insignia of rank for Warrant Officers are as follows: _Interne._—A rod of Esculapius with a single serpent entwined about it, in silver. _Pharmacist._—No rank insignia on shoulder straps. On the sleeves of the dress and service coats five inches above the edge there is a “cachet” indicating the rank. This consists of a circular piece of maroon broadcloth one-half inch in diameter surrounded by a circle of gold embroidery one-eighth of an inch wide. For the white service and khaki uniforms the “cachet” is made of enameled metal. Pharmacists of the third class wear one such mark, those of the second class two and those of the first class three. [Illustration: U. S. Public Health Service Chevrons worn on the sleeves by petty officers to indicate rank and duty 1. Station Engineer 2. Marine Engineer 3. Pilot 4. First Cook] [Illustration: U. S. Public Health Service Specialty marks worn on the sleeves by petty officers and special detail men to indicate rank or duty 1. Worn by Cooks other than first cooks 2. Carpenter 3. Coachman 4. Yardman 5. Messenger 6. Laundryman 7. Night Watchman 8. Shipkeeper 9. Boatswain 10. Surgical Nurse 11. Coxswain] _Clerk._—Two crossed pens one and a quarter inches in length, embroidered in maroon silk on the dress and service coats and made of enameled metal for the white and khaki coats. _Collar Ornaments._—The collar ornaments for the dress and service coats are the letters “U. S.” in metal in Gothic design, five-eighths of an inch high, and the service insignia in metal. For the dress and olive-drab and khaki service uniforms these ornaments are of gun-metal and for the white coat they are of gilt metal. _Buttons._—The buttons worn by officers of the Public Health Service are of metal and bear the insignia of the service, a foul anchor crossed by a caduceus, the anchor being horizontal and the staff of the caduceus vertical. _Sword and Belts._—The sword for commissioned officers has a straight blade, of diamond shape, 29 to 32 inches long, Hilt pommel, inverted frustrum of a cone with corps device chased on one side and star on the other. Grip, white sharkskin wrapped with gilt wire. Front guard bears corps device; spring back guard, with trophy device. Black leather scabbard with gilt bands, a five-pointed star on each; upper band to have two rings. Tip to be 5 inches long, with laurel branch engraved on the right side. The belt for full dress is one and three-quarters inches wide, with two sling straps three-fourths of an inch wide, covered with gold lace braid and closed by a gilt buckle clasp consisting of a wreath of laurel leaves surrounding a design similar to the service button. The service uniform belt is the same as the full dress belt but it is made entirely of black grain leather. The sword knot is a strap of one-half inch gold lace twenty-four inches long.