abraded
51Grigori Rasputin — Infobox Person name = Grigori Yefimovich Rasputin image size = 200px caption = Grigori Rasputin birth name = birth date = birth date|1869|1|22 birth place = Pokrovskoye, Siberia death date = death date and age|1916|12|29|1869|1|22 death place =… …
52Lens (optics) — For other uses, see Lens. A lens. Lenses can be used to focus light. A lens is an optical device with perfect or approximate axial symmetry which tra …
53Penicillin — For the Japanese band, see Penicillin (band). Penicillin core structure. The R is the variable group. Penicillin (sometimes abbreviated PCN or pen) is a group of antibiotics derived from Penicillium fungi.[1] They include …
54Steel — For other uses, see Steel (disambiguation). The steel cable of a colliery winding tower …
55Masaccio — Detail of St. Peter Raising the Son of Theophilus and St. Peter Enthroned as First Bishop of Antioch, Brancacci Chapel, S. Maria del Carmine, Florence Birth name Tommaso di Ser Giovanni di Mone (Simone) Cassai …
56Aconitum — This article is about the herb sometimes known as wolfsbane. For other uses, see Wolfsbane (disambiguation). Monkshood Aconitum variegatum Scientific classification …
57Boric acid — Boric acid …
58Borax — For other uses, see Borax (disambiguation). Sodium borate redirects here. For sodium perborate, see Sodium perborate. Borax …
59Our Lady of Guadalupe — This article is about the Mexican icon. For the Spanish icon, see Our Lady of Guadalupe, Extremadura. Our Lady of Guadalupe Location Tepeyac, Mexico City, Mexico Date …
60Bow drill — The bow drill is an ancient tool. While it was usually used to make fire, it was also used for primitive woodworking and dentistry. It consists of a bearing block or handhold , a spindle or drill , a hearth or fireboard , and a simple bow .… …
