Uniform Regulations, 1864
Cap and Cap Ornaments.
Cap ornaments shall consist of a gold wreath in front, composed of oak and olive branches, three inches in width, and enclosing the following described devices:
FOR A REAR ADMIRAL.
Diameter of Stars, five-eighths inch. Between centre of Stars, four-fifths inch.
Two Stars embroidered in Silver.
FOR COMMODORE, CAPTAIN, COMMANDER, LIEUTENANT-COMMANDER, LIEUTENANT, MASTER, AND ENSIGN.
Length of Anchor, seven-eighths inch.
A Foul Anchor embroidered in Silver.
FOR MEDICAL OFFICERS.
Length of Leaf, nine-tenths inch.
An Oak Leaf embroidered in Silver.
Length of Cross, seven-eighths inch. Width of Cross, half inch.
A Cross, placed obliquely and embroidered in Silver.
Diameter of circle, four-fifths inch, with letter raised in relief.
Yellow centre, with letter P in old English, embroidered in Silver.
Length of Letter, half inch.
Letter S in old English, embroidered in Silver.
Height of Centre Ornament, nine-tenths of an inch.
An Oak Sprig, embroidered in Silver.
Length of Centre Ornament, on and one-tenth inch. Height of Centre Ornament, nine-tenths inch.
Cross Oak Leaves, embroidered in Silver.
FOR NAVAL CONSTRUCTORS.
Spread of Leaves, one and one-fourth inch.
A Live Oak Sprig, embroidered in Silver.
For all other officers, simply the wreath.
Source: Uniform for Officers of the United States Navy, As Prescribed in Regulations for the Uniform of the U.S. Navy, Jan. 28, 1864. Tomes, Melvain & Co., 6 Maiden Lane, New York. Entered according to Act of Congress, in the year 1864, BY TOMES, MELVAIN & CO., in the Clerk's Office of the District Court of the United States, in and for the Southern District of New-York. The text is reproduced here exactly as in the original, following the original use of capitalization and italics.