revdocdrew:

A "twist" in the laminae of steel definition: "...it is advisable to state here that, so far as known, the strongest forged or twist barrel is the laminated steel now usually termed "stub-Damascus," made of three twisted rods to the riband.

The word laminated, as the designation of a gun barrel, arose from the fact that early in the last century thin strips, plates, or laminae of steel, piled alternately with iron strips or plates, formed the composite metal from which they were made. The differ from Damascus in so far as the iron and steel are differently arranged in the pile, so that instead of a decided curl in the figure there is only what may be termed "herring-bone" lines running spirally round the barrel from end to end. Technically, laminated steel is a name metallurgists apply to faulty steel. It has been used in the gun trade for more than half a century in quite a different sense, as here stated." Greener - "The Gun" 9th edition, p. 239.

I re-read the portion of chapter X dealing with gun barrels. It seems that there are possibly 1/2 dozen laminated definitions.

Kind Regards,

Raimey
rse