Middle Ages (5th-15th Century)

Before we continue describing the evolution of ways to mark the passage of time, perhaps we should broadly define what constitutes a clock. All clocks must have two basic components:

a regular, constant or repetitive process or action to mark off equal increments of time. Early examples of such processes included the movement of the sun across the sky, candles marked in increments, oil lamps with marked reservoirs, sand glasses (hourglasses), and in the Orient, knotted cords and small stone or metal mazes filled with incense that would burn at a certain pace. Modern clocks use a balance wheel, pendulum, vibrating crystal, or electromagnetic waves associated with the internal workings of atoms as their regulators.

a means of keeping track of the increments of time and displaying the result. Our ways of keeping track of the passage of time include the position of clock hands and digital time displays.

The history of timekeeping is the story of the search for ever more consistent actions or processes to regulate the rate of a clock.

This is the calendar FAQ. Its purpose is to give an overview of the Christian, Hebrew, Persian, and Islamic calendars in common use. It will provide a historical background for the Christian calendar, plus an overview of the French Revolutionary calendar, the Maya calendar, and the Chinese calendar.

The two greatest misconceptions about medicine arise primarily from our modern attempts at interpreting the medical system of the Middle Ages. The first misconception is to see medicine in the Middle Ages as an unsophisticated system. Early scholars of medieval medicine found medieval doctors' theories ridiculous when compared to modern ones. Charles Singer, for example, found medieval medicine demonstrative of "the wilting mind of the Dark Ages." <1> Singer also believed that medieval medicine, specifically the Anglo-Saxon herbals, "lacked any rational element which might mark the beginnings of scientific advance."<2> But recently, historians like M.L. Cameron in Anglo-Saxon Medicineand John Riddle in Contraception and Abortion from the Ancient World to the Renaissance attempt to validate medieval medicine in light of modern medicine. By analyzing common herbals, both Cameron and Riddle have found a few recipes that have therapeutic merit.

The history of engineering can be roughly divided into four overlapping phases, each marked by a revolution:

Pre-scientific revolution: The prehistory of modern engineering features ancient master builders and Renaissance engineers such as Leonardo da Vinci.

Industrial revolution: From the eighteenth through early nineteenth century, civil and mechanical engineers changed from practical artists to scientific professionals.

Second industrial revolution: In the century before World War II, chemical, electrical, and other science-based engineering branches developed electricity, telecommunications, cars, airplanes, and mass production.

Information revolution: As engineering science matured after the war, microelectronics, computers, and telecommunications jointly produced information technology.

The David Rumsey Historical Map Collection has over 8,800 maps online. The collection focuses on rare 18th and 19th century North and South America maps and other cartographic materials. Historic maps of the World, Europe, Asia and Africa are also represented. Collection categories include antique atlas, globe, school geography, maritime chart, state, county, city, pocket, wall, childrens and manuscript maps. The collection can be used to study history, genealogy and family history.

Whether you are an academic, family historian, collector, teacher or parent - welcome! All the worthwhile information about old maps can be found here, or from here. The 100 'pages' of this carefully organised site offer comment and guidance, and many, many links - selected for relevance and quality

The main events of the history of the psychology
are represented in a timeline that extends since the
year 600 before our era until the present time.
To make it faster for you, we have divided the
timeline in three parts:
Year 600 before our era to 1899
1900 to 1949
1950 up to our days

Time is considered one of our most valuable assets. The keeping of time goes all the way back to the beginning of civilization. Both historians and archeologists believe that stationary and portable sun-dials were probably developed in Egypt or Mesopotamia. The oldest extant sun-dial can be found in Egypt and dates back to 1500 BCE. We know that the early Egyptians used the pyramids as well as the obelisks as a forerunner to the sundial.

This is an e-text about the historical and philosophical background of Psychology. It was originally written for the benefit of my students at Shippensburg University, but I hope that it helps anyone with an intellectual interest in the field. The material is original and copyrighted by myself, and any distribution must be accompanied by my name and the copyright information. For personal educational use, it is free to one and all.

Bedlam: Custody Care and Cure 1247-1997 at the Museum of London until 15 March 1998. This exhibition tells the fascinating 750-year-old story of Bethlem Royal Hospital, popularly known as 'Bedlam'.

Bethlem is the world's oldest institution caring for people with mental disorders. It has been a part of London since 1247 and many people, rich and poor, have played a part in its history