Engineering drawing drawing on A3 may be enlarged to A2 or reduced to A4. The U.S. customary "A-size" corresponds to "letter" size, and "B-size" corresponds to "ledger" or "tabloid" size. There were also once British paper sizes, which went by names rather than alphanumeric designations. American Society of Mechanical Engineers (ASME) ANSI/ASME Y14.1, Y14.2, Y14.3, and Y14.5 are commonly referenced standards in the U.S. Technical lettering is the process of forming letters, numerals, and other characters in technical drawing. It is used to describe, or provide detailed specifications for an object. With the goals of legibility and uniformity, styles are standardized and
Ledger stone ledger slabs. These occur in the East Midland counties of Leicestershire, Derbyshire and Nottinghamshire, with four outlying examples in Lincolnshire. Examples date mainly from the 14th and 15th centuries, with incised figures. An exceptional example of an alabaster ledger slab is that of Richard and Isabel Tresham in Geddington Church in Northamptonshire dated 1433. The sword in the slab is inlaid with a blueish-greenish stone as is also Isabel's headdress. Richard is shown with a dog beneath his feet and below the couple are their six children, five daughters and a son. Swithland slate was widely used for ledger and