Tag Archives: Flamsteed

Newton’s birthplace in Woolsthorpe Manor

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One of my last visits in England in August was Woolsthorpe Manor House which is Newton’s birthplace. We had to take the flight in the afternoon but we got up early and we drove until we arrived to this sacred place!

Photography by Carlos Dorce

Photography by Carlos Dorce

Of course almost all the objects of the house are reproductions of the original ones which were used by Newton and his family. There also is a room dedicated to explaining his life and scientific contribution…

Photography by Carlos Dorce

Photography by Carlos Dorce

…where it’s possible to find a lock of his hair:

Photography by Carlos Dorce

Photography by Carlos Dorce

The room where he was born is absolutely reconstructed and a plaque remembers us the great date:

Photography by Carlos Dorce

Photography by Carlos Dorce

There is the famous apple tree outside:

Photography by Carlos Dorce

Photography by Carlos Dorce

A tree with a place in history

Woolsthorpe is the home of the Flower of Kent tree connected with Newton’s story of how he discovered the law of gravitation -a story told by Newton himself to William Stukeley, one of his biographers, in 1726:

Stukeley wrote:

“…after dinner, the weather being warm, we went into the garden, & drank tea under the shade of some appletrees, only he, & myself. amidst other discourse, he told me, he was just in the same situation, as when formerly, the notion of gravitation came into his mind. “Why should that apple always descend perpendicularly to the ground,” thought he to himself: occasion’d by the fall of an apple, as he sat in a contemplative mood: “why should it not go sideways, or upwards? but constantly to the earths centre? assuredly, the reason is, that the earth draws it…”

The tree adquired a local reputation and after Newton’s death people would make the pilgrimage to the Manor House and to see the tree in the orchard. In 1820 the tree blew down after a storm. Sketches were made of it and the broken wood was used to make snuff boxes and small trinkets. Fortunately the tree remained rooted and re-grew strongly -this is the tree we have now.

There are descendants of the tree planted throughout the world, including at Trinity College, Cambridge, at the Massachussets Institute of Technology in the United States, and at Tianjin University in China. There are also several in this orchars, so that when the tree comes to the natural end of its life there will be descendants to carry on the story.

In another house there is a little exhibition about Newton’s experiments and discoveries:

Photography by Carlos Dorce

Photography by Carlos Dorce

There is also little information about other contemporany scientists like Leibniz, Hooke or Flamsteed:

Photography by Carlos Dorce

Photography by Carlos Dorce

Finally, there is a sundial in the orchard (of course!):

Photography by Carlos Dorce

Photography by Carlos Dorce

Location: Woolsthorpe Manor (map)

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The Royal Observatory in Greenwich (and III)

Source: Wikimedia Commons

The third step in the visit to the Royal Observatory of Greenwich is Flamsteed House.

The Royal Observatory of Greenwich was founded in 1675 when Charles II ordered that a small observatory be built in Greenwich Park and appointed John Flamsteed as his ‘astronomical observator’. Flamsteed’s task was to make observations that would improve astronomical navigation, in particular providing a means of finding longitude at sea.

Photography by Carlos Dorce

Photography by Carlos Dorce

The ceiling of the first room is painted with a map of the night sky and there are portraits of the ten Astronomers Royal who lived here between 1676 and 1948:

Photography by Carlos Dorce

Photography by Carlos Dorce

Christopher Wren was responsible for building the Observatory. He later said that it was designed ‘for the Observator’s habitation & a little for Pompe’. The following four rooms were Flamsteed’s living quarters. They were incorporated into the enlarged home of the Astronomer’s Royal over the next two and a half centuries. Beyond these, upstairs, is the magnificient Great Star Room, or Octagon Room.

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The Octagon Room by Francis Place (c. 1760)

The Octagon Room is one of the few surviving interiors designed by Wren and it was used mainly for observing eclipses, comets and other unusual celestial events.

The 32-inch Astronomical Quadrant is located in this room. It is signed by John Bird but the telescope which was once attached is missing.

Photography by Carlos Dorce

Photography by Carlos Dorce

The engraving of the Octagon Room by Francis Place shows a similar, earlier quadrant standing on a wheel-tripod platform, which allowed the astronomer to roll it from window to window.

On the wall behind the quadrant we can see three replicas of the clocks which were made in 1676 by Thomas Tompion and sold by Flamsteed’s widow some years later. There is also a replica telescope tube of the kind used here until 1765. Will my daughter be able to discover a new planet?

Photography by Carlos Dorce

Photography by Carlos Dorce

If we go downstairs now we’ll discover an exhibition about the determination of the longitude at sea:

Where am I?

At sea, navigation is a matter of life and death. Out of sight of land, how can you tell where you are?

By 1700, skilled seamen could find their position north or south (their latitude), but still lacked accurated instruments or methods to calculate their east-west position, known as longitude.

With growing international trade, the lives and valuable cargoes lost in shipwrecks made solving this ‘Longitude Problem’ urgent for all sea-going nations.

Photography by Carlos Dorce

Photography by Carlos Dorce

The exhibition starts with these two 17th-century globes from North Africa (left) and Persia (right) and then you meet the star of the ‘Longitude Problem’:

John Harrison Photography by Carlos Dorce

John Harrison (1693-1776) by Thomas King (c. 1766)
Photography by Carlos Dorce

Finding longitude – the timekeeper method

One solution to the Longitude Problem was an accurate and portable sea-going clock. By 1726, news of the Longitude Prize had reached John Harrison, a carpenter and self-taught clockmaker from Lincolnshire. Harrison was already making highly accurate land-based clocks and had solved major problems to do with temperature change and friction.

Harrison spent the next 45 years of his life developing portable sea-going timekeepers that would accurately, in spite of a ship’s motion and temperature changes. Each timekeeper represented years of obsessive labour.

By 1760, Harrison had solved the Longitude Problem with his fourth marine timekeeper, now known as H4. It is one of the most important machines ever made.

Photography by Carlos Dorce

Photography by Carlos Dorce

Harrison’s first timekeeper [H1]

This timekeeper took five years to build. In 1736, it was tested on a sea voyage to Lisbon and back. Harrison was very seasick, but the timekeeper worked. It was the most accurate sea-going clock then known, though not quite accurate enough to win the 20.000 pounds prize.

This prize was offered in 1734 by the British government for a ‘practical and useful’ method enabling ships to determine their longitude at sea.

In the exhibition there are also some timekeepers more and the portraits of some of the most important scientific men which lived in the same time as Harrison: Halley succeeded Flamsteed as Astronomer Royale and his major programme was to replace all the astronomical instruments which were sold by Flamsteed’s widow, and to chart the Moon’s 19-year cycle.

Edmund Halley Photography by Carlos Dorce

Edmund Halley by George White after G.Kneller (c.1721)
Photography by Carlos Dorce

Newton advised the Parliamentary committee that established the Longitude Prize and became a member of the Board of Longitude:

Sir Isaac Newton Photography by Carlos Dorce

Sir Isaac Newton by Jacobus Houbraken after G.Kneller (18th century)
Photography by Carlos Dorce

Finally, apart of the camera obscura, we can find outside the Family Tombstone of Halley which was moved to the Observatory from the churchyard of St. Margaret’s in Lee when Halley’s tomb was restored in 1854. The tomb itself is still located at St. Margaret’s with a replica tombstone in place:

Photography by Carlos Dorce

Photography by Carlos Dorce

As you have seen, you must visit the Royal Observatory in Greenwich if you visit London: it’s only a few metro stops from the center of the city!

LocationGreenwich Observatory (map)

The Royal Observatory in Greenwich (II)

Photography by Carlos Dorce

Photography by Carlos Dorce

The Royal Observatory of Greenwich was commisioned in 1675 by Charles II and the building was completed in the summer of 1676. John Flamsteed (1646-1719) was the first Astronomer Royal so the building was often given the title “Flamsteed House” in reference to its first occupant.

In one of the walls, the observatory has the Sepherd 24-hour Gate Clock which is the earliest electrically driven public clocks. It was installed in 1852 ans the dial always shows Greenwich Mean Time (GMT):

Photography by Carlos Dorce

Photography by Carlos Dorce

In the small plate under the clock (G 1692) is an Ordnance Survey bench mark dating from the 1940s. The height above the sea level has been measured and recorded. There are also the British Imperial Standards of Length which were mounted here some time before 1866.

The observatory is also known as the location of the prime meridian of Greenwich meridian:

Photography by Carlos Dorce

Photography by Carlos Dorce

All the tourist want to have a picture with a foot in each side of the meridian:

Photography by Carlos Dorce

Photography by Carlos Dorce

and there is always a large queue to take a picture next to the meridian line which is graved ion the terrace:

Photography by Carlos Dorce

Photography by Carlos Dorce

Another characteristic thing of the obervatory is the Time Ball. The red time ball on top of Flamsteed House is one of the world’s first visual time signals. It was installed in 1833 to enable navigators on ships in the Thames to check their marine chronometers.

The Time Ball drops daily at 13:00hrs (GMT in winter […]). It is raised halfway up the mast at 12:55hrs as a preparatory signal and to the top 2 minutes before it drops.

Photography by Carlos Dorce

Photography by Carlos Dorce

 Let’s start our visit through the gardens of the observatory where we can imagine the great English astronomers looking at the night sky! Ofcourse we find a sundial: 

Photography by Carlos Dorce

Photography by Carlos Dorce

Sundials are the oldest known device for telling the time. As the Earth rotates and the Sun appears to move accross the sky, the shadow cast on the scale indicates the time of the day.

This dial constructed in 1968, represents a globe made from a series of rings. The rings are called ‘armillae’ in Latin, so it is called an armillary dial. The hour scale is on the northern half of the ring representing the equator.

There is also the well where Flamsteed 100-foot telescope was located:

Photography by Carlos Dorce

Photography by Carlos Dorce

Flamsteed used a 30,5 m. well on this site to accomodate a very long telescope:

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The astronomer sat at the bottom of the well and observed stars that passed directly overhead. It was hoped that placing the telescope in the well would make it possible to create a steady long-focus instrument for very fine measurements. Flamsteed made a few observations from here in 1679, but the damp underground conditions soon made the telescope impossible to use.

A remaining section of a 12 m. reflecting telescope built for the astronomer William Herschel is also in the gardens:

Photography by Carlos Dorce

Photography by Carlos Dorce

The telescope was the largest in the world and cost over 4.000 pounds, paid for by King George III. Completed in 1789 and erected at Herschel’s home near Slough, about 30 miles (48 km) west of Greenwich, it soon became a tourist attraction. Some people likened it to the Colossus of Rhodes, and it was even marked on the 1830 Ordnance Survey map of the area.

Sadly, the Herschels did not use the great telescope for much serious astronomy since it was difficult to set up and mantain. William’s son had it dismantled in 1840. Most of the tube was destroyed when a tree fell on it 30 years later.

On the walls of Flamsteed House is marked  the Bradley Merdian which was the first British National Meridian. The Greenwich meridian was set according to the location of the telescope used by the Astronomer Royal to establish the time. So the Greenwich meridian was in the graved line when James Bradley, the 3rd Astronomer Royal between 1742 and 1762 was in the observatory. When the Airy Transit Circle Telescope was erected in 1850, the Greenwich Meridian was moved approximately 19 feet east to its present location.

Before visiting Flamsteed House there is still time for look at the Dolphin Sundial designed by Christopher St. J. H. Daniel and commisioned by the National Maritime Museum in 1977:

Photography by Carlos Dorce

Photography by Carlos Dorce

So let’s go now to Flamsteed House!

LocationGreenwich Observatory (map)