1884, Alfred Ronald Conkling,Appleton's Guide to Mexico, page43:
It is built of alternatestrata of brick and clay, and the sides correspond to the direction of the meridians and parallels.
1952 July, W. R. Watson, “Sankey Viaduct and Embankment”, inRailway Magazine, page487:
He describes the operation thus: "The heavy ram employed to impart the finishing strokes, hoisted up with double purchase and snail's pace to the summit of the Piling Engine, and then falling down like a thunderbolt on the head of the devoted timber, driving it perhaps a single half inch in to thestratum below, is well calculated to put to the test the virtue of patience, while it illustrates the old adage of—slow and sure."
1961 November, “Talking of Trains: The subsidence problem”, inTrains Illustrated, page651:
An illuminating article in a recent issue of the Eastern Region'sCivil Engineering News points out that where coal is worked over a reasonably large area, it is not only the whole of thestrata above the workings, but also an area beyond which is liable to subside at varying rates after the coal has been removed.
2006, Roderick W. Smith,Linux Samba Server Administration:
Computers that synchronize themselves to thestratum 1 time servers are known asstratum 2 time servers if they allow others to synchronize to them, and so on.
“stratum”, inCharlton T. Lewis (1891)An Elementary Latin Dictionary, New York: Harper & Brothers
"stratum", in Charles du Fresne du Cange’sGlossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
stratum on Wikipedia.Wikipedia