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Razor Blade
A razor is a bladed tool primarily used in the removal of body hair through the act of shaving. Kinds of razors include straight razors, safety razors, disposable razors, and electric razors. While the razor has been in existence since before the Bronze Age (the oldest razor-like object has been dated to 18,000 BC), the most common types of razors currently used are the safety razor and the electric razor. History Razors have been identified from many Bronze Age cultures. These were made of bronze or obsidian and were generally oval-shaped, with a small tang protruding from one of the short ends.Warwickshire County Council: New Prehistoric Archaeology Objects "Even further away in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Personal Grooming
Grooming (also called preening) is the art and practice of cleaning and maintaining parts of the body. It is a species-typical behavior. In animals Individual animals regularly clean themselves and put their fur, feathers or other skin coverings in good order. This activity is known as personal grooming, a form of hygiene. Extracting foreign objects such as insects, leaves, dirt, twigs and parasites is a form of grooming. Among animals, birds spend considerable time preening their feathers. This is done to remove ectoparasites, keep the feathers in good aerodynamic condition, and waterproof them. To do that, they use the preen oil secreted by the uropygial gland, the dust of down feathers, or other means such as dust-bathing or anting. During oil spills, animal conservationists that rescue penguins sometimes dress them in knitted sweaters to stop them from preening and thereby ingesting the mineral oil, which is poisonous. Monkeys may also pick out nits from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obsidian
Obsidian ( ) is a naturally occurring volcanic glass formed when lava extrusive rock, extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Produced from felsic lava, obsidian is rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. It is commonly found within the margins of rhyolite, rhyolitic lava flows known as obsidian flows. These flows have a high content of silicon dioxide, silica, giving them a high viscosity. The high viscosity inhibits the atomic diffusion, diffusion of atoms through the lava, which inhibits the first step (nucleation) in the formation of mineral crystals. Together with rapid cooling, this results in a natural glass forming from the lava. Obsidian is hard, Brittleness, brittle, and amorphous; it therefore Fracture (mineralogy)#Conchoidal fracture, fractures with sharp edges. In the past, it was used to manufacture cutting and piercing tools, and it has been used experimentally as s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hardness
In materials science, hardness (antonym: softness) is a measure of the resistance to plastic deformation, such as an indentation (over an area) or a scratch (linear), induced mechanically either by Pressing (metalworking), pressing or abrasion (mechanical), abrasion. In general, different materials differ in their hardness; for example hard metals such as titanium and beryllium are harder than soft metals such as sodium and metallic tin, or wood and common plastics. Macroscopic hardness is generally characterized by strong intermolecular bonds, but the behavior of solid materials under force is complex; therefore, hardness can be measured in different ways, such as scratch hardness, indentation hardness, and rebound hardness. Hardness is dependent on ductility, elasticity (physics), elastic stiffness, plasticity (physics), plasticity, deformation (mechanics), strain, strength of materials, strength, toughness, viscoelasticity, and viscosity. Common examples of hard matter are cer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benjamin Huntsman
Benjamin Huntsman (4 June 170420 June 1776) was an England, English inventor and manufacturer of cast or crucible steel. Biography Huntsman was born the fourth child of William and Mary (née Nainby) Huntsman, a Quaker farming couple, in Epworth, England, Epworth, Lincolnshire. Some sources suggest that his parents were German immigrants, but it seems that they were both born in Lincolnshire. Huntsman started business as a clock, lock and tool maker in Doncaster, Yorkshire. His reputation enabled him to also practice surgery in an experimental fashion and he was also consulted as an oculist. Huntsman experimented in steel manufacture, first at Doncaster. Then, in 1740, he moved to Handsworth, South Yorkshire, Handsworth, near Sheffield. Eventually, after many experiments, Huntsman was able to make satisfactory Crucible steel, cast steel, in clay pot crucibles, each holding about of Cementation process, blistered steel. A Flux (metallurgy), flux was added, and they were cove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cutlery
Cutlery (also referred to as silverware, flatware, or tableware) includes any hand implement used in preparing, serving, and especially eating food in Western culture. A person who makes or sells cutlery is called a cutler. While most cutlers were historically men, women could be cutlers too; Agnes Cotiller was working as a cutler in London in 1346, and training a woman apprentice, known as Juseana. The city of Sheffield in England has been famous for the production of cutlery since the 17th century and a train – the ''Master Cutler'' – running from Sheffield to London was named after the industry. Bringing affordable cutlery to the masses, stainless steel was developed in Sheffield in the early 20th century. The major items of cutlery in Western culture are the knife, fork and spoon. These three implements first appeared together on tables in Britain in the Georgian era. In recent times, hybrid versions of cutlery have been made combining the functionality of differe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sheffield
Sheffield is a city in South Yorkshire, England, situated south of Leeds and east of Manchester. The city is the administrative centre of the City of Sheffield. It is historically part of the West Riding of Yorkshire and some of its southern suburbs were transferred from Derbyshire to the city council. It is the largest settlement in South Yorkshire and the third largest of Northern England. The city is in the North Midlands, in the eastern foothills of the Pennines and the valleys of the River Don with its four tributaries: the Loxley, the Porter Brook, the Rivelin and the Sheaf. Sixty-one per cent of Sheffield's entire area is green space and a third of the city lies within the Peak District national park and is the fifth-largest city in England. There are more than 250 parks, woodlands and gardens in the city, which is estimated to contain around 4.5 million trees. Sheffield played a crucial role in the Industrial Revolution, developing many signifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lucius Tarquinius Priscus
Lucius Tarquinius Priscus (), or Tarquin the Elder, was the legendary fifth king of Rome and first of its Etruscan dynasty. He reigned for thirty-eight years.Livy, '' ab urbe condita libri'', I Tarquinius expanded Roman power through military conquest and grand architectural constructions. His wife was the prophetess Tanaquil. Not much is known about the early life of Lucius Tarquinius Priscus. According to Livy, Tarquin came from Etruria. Livy claims that his original Etruscan name was , but since '' lucumo'' is the latinized form of the Etruscan word "king", there is reason to believe that his name and title have been confused in the official tradition. After inheriting his father's entire fortune, Lucius attempted to gain a political office. However, he was prohibited from obtaining political office in Tarquinii because of the ethnicity of his father, Demaratus, who came from the Greek city of Corinth. As a result, his wife Tanaquil advised him to relocate to Rome. Leg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancient Rome
In modern historiography, ancient Rome is the Roman people, Roman civilisation from the founding of Rome, founding of the Italian city of Rome in the 8th century BC to the Fall of the Western Roman Empire, collapse of the Western Roman Empire in the 5th century AD. It encompasses the Roman Kingdom (753–509 BC), the Roman Republic (50927 BC), and the Roman Empire (27 BC476 AD) until the fall of the western empire. Ancient Rome began as an Italic peoples, Italic settlement, traditionally dated to 753 BC, beside the River Tiber in the Italian peninsula. The settlement grew into the city and polity of Rome, and came to control its neighbours through a combination of treaties and military strength. It eventually controlled the Italian Peninsula, assimilating the Greece, Greek culture of southern Italy (Magna Graecia) and the Etruscans, Etruscan culture, and then became the dominant power in the Mediterranean region and parts of Europe. At its hei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Livy
Titus Livius (; 59 BC – AD 17), known in English as Livy ( ), was a Roman historian. He wrote a monumental history of Rome and the Roman people, titled , covering the period from the earliest legends of Rome before the traditional founding in 753 BC through the reign of Augustus in Livy's own lifetime. He was on good terms with members of the Julio-Claudian dynasty and was a friend of Augustus. Livy encouraged Augustus’s young grandnephew, the future emperor Claudius, to take up the writing of history. Life Livy was born in Patavium in northern Italy, now modern Padua, probably in 59 BC. At the time of his birth, his home city of Patavium was the second wealthiest on the Italian peninsula, and the largest in the province of Cisalpine Gaul (northern Italy). Cisalpine Gaul was merged into Italy proper during his lifetime and its inhabitants were given Roman citizenship by Julius Caesar. In his works, Livy often expressed his deep affection and pride for Patavium, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kerma Culture
The Kingdom of Kerma or the Kerma culture was an early civilization centered in Kerma, Sudan. It flourished from around 2500 BC to 1500 BC in ancient Nubia. The Kerma culture was based in the southern part of Nubia, or "Upper Nubia" (in parts of present-day northern and central Sudan), and later extended its reach northward into Lower Nubia and the border of Egypt. The polity seems to have been one of a number of Nile Valley states during the Middle Kingdom of Egypt. In the Kingdom of Kerma's latest phase, lasting from about 1700 to 1500 BC, it absorbed the Sudanese kingdom of Sai (island), Sai and became a sizable, populous empire rivaling Egypt. Around 1500 BC, it was absorbed into the New Kingdom of Egypt, but rebellions continued for centuries. By the eleventh century BC, the more-Egyptianized Kingdom of Kush emerged, possibly from Kerma, and regained the region's independence from Egypt. Site The primary site of Kerma that forms the heart of the Kingdom of Kerma includes bot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egypt
Egypt ( , ), officially the Arab Republic of Egypt, is a country spanning the Northeast Africa, northeast corner of Africa and Western Asia, southwest corner of Asia via the Sinai Peninsula. It is bordered by the Mediterranean Sea to northern coast of Egypt, the north, the Gaza Strip of Palestine and Israel to Egypt–Israel barrier, the northeast, the Red Sea to the east, Sudan to Egypt–Sudan border, the south, and Libya to Egypt–Libya border, the west; the Gulf of Aqaba in the northeast separates Egypt from Jordan and Saudi Arabia. Cairo is the capital, list of cities and towns in Egypt, largest city, and leading cultural center, while Alexandria is the second-largest city and an important hub of industry and tourism. With over 109 million inhabitants, Egypt is the List of African countries by population, third-most populous country in Africa and List of countries and dependencies by population, 15th-most populated in the world. Egypt has one of the longest histories o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flint
Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Historically, flint was widely used to make stone tools and start fires. Flint occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones.''The Flints from Portsdown Hill'' Inside the nodule, flint is usually dark grey or black, green, white, or brown in colour, and has a glassy or waxy appearance. A thin, oxidised layer on the outside of the nodules is usually different in colour, typically white and rough in texture. The nodules can often be found along s and [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
