May 19.] THE NEW ZEALAND GAZETTE. 1477

links cut from the chain; (6) the identifying letter or number, stamped on
the chain or on a label attached to the chain to which the certificate refers;
(7) description of chain; (8) diameter of chain; (9) length of chain to which
certificate refers; (10) elongation of chain in testing-machine; (11) the
maker of the chain shall certify as to the grade of iron of which chain has
been made, and the number and date of the certificate for the iron.

The test certificate shall also show a description of the leading dimensions
of any rings, long or wide links, shackles, swivels, or hooks that may be
attached to the chain.

The test certificate for the iron from which the chain has been made
shall show—(1) The name and address of the manufacturer of the iron;
(2) the name and address of the testing establishment; (3) the grade of the
iron; (4) the order number; (5) to whom supplied; (6) the tensile strength;
(7) the minimum elongation and length in which measured; (8) the
minimum contraction of area per cent. of original area; (9) the certificate
shall state that the iron has been manufactured and tested in accordance
with the specification of the British Engineering Standards Association,
Report No. 51 and its amendments, if any; (10) the signature of the
person witnessing the test; (11) date of test.

Testing of repaired chain.

9. Chains which have been in use and which have been repaired by
   the adding of new links shall be retested. The test-load shall not be less
   than twice the working-load specified in Table No. 1. No chain which has
   been so repaired shall be put into use until it has passed a satisfactory test.

Annealing of chains.

10. All chains shall be periodically examined and shall be effectively
    softened by annealing or firing when necessary. Half-inch or smaller chains
    in general use shall be so annealed or fired once in every six months.

If the chains are part of the outfit of a seagoing ship, it shall be
sufficient compliance with this regulation as regards softening by annealing
or firing of ½ in. or smaller chains that no such chains shall be used unless
they have been so annealed or fired within six months preceding.

Permissible wear of chain.

11. Chain which has been worn so that the wear at any part exceeds
    ¹⁄₁₆ in. on chains up to ½ in. diameter, ⁵⁄₆₄ in. for ⁵⁄₈ in. chain, and ¹⁄₆₄ in. for
    every ⅛ in. increase in diameter up to 2 in., must not be used until the worn
    parts have been renewed.

Strength of attachments to chain or rope.

12. Rings, long or wide links, shackles, swivels, and hooks shall be
    equal in strength to the chains, ropes, or slings to which they are attached.

Material of and dimensions for rings.

13. Dimensions for rings are given in the Tables Nos. 27 and 28 and in
    Diagram No. 15. Rings for chains and ropes shall be made of iron of the
    quality specified in section 6 for chain, and may be of the dimensions
    indicated in the tables and diagram for the various sizes of chains and
    ropes; but where chains or ropes have rings of other proportions attached
    to them the rings shall be at least of equal strength to the rings specified in
    the tables and diagram for the particular size of chain. The strength of a
    ring shall be assumed to vary directly as the cube of the diameter of the
    iron of the ring, and inversely as the mean diameter of the ring.