Indentation hardness test, performed with either 3 gf or 9 gf loads, preceded the development of microhardness testers using traditional indenters. In 1925, Smith and Sandland of the UK developed an indentation test that employed a square-based pyramidal indenter made from diamond. They chose the pyramidal shape with an angle of 136° between opposite faces in order to obtain hardness numbers that would be as close as possible to Brinell hardness numbers for the specimen. The Vickers test has a great advantage of using one hardness scale to test all materials.The first reference to the Vickers indenter with low loads was made
123-125 George Street, The Rocks Free Classical style, executed to give a sense of decorum to what would otherwise have been simple commercial / residential structures. The buildings have streetscape value as two buildings in a group of three that were designed to appear as one property. The buildings' scale and alignment to the street are typical of that found along the business precinct of George Street in The Rocks area. The street façades have remained relatively intact since they were constructed in 1882. The place has a strong or special association with a particular community or cultural group in New South Wales for social,