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
Lilyvale, The Rocks decades of the 20th century. The buildings on the site combine to form an interesting group, reminiscent of the lively and diverse early streetscapes and urban scale of The Rocks. "Lilyvale" was listed on the New South Wales State Heritage Register on 10 May 2002 having satisfied the following criteria. The place is important in demonstrating the course, or pattern, of cultural or natural history in New South Wales. "Lilyvale" (176 Cumberland Street) is an integral component of a group of 19th century houses in this section of Cumberland Street, which collectively illustrate the range, diversity and urban scale of