Replica Working Models of Astronomic Instruments

Analemmatic Ref: LH-H20

HEMISFERIUM

Price: £22.17 (Including VAT at 17.5%)

HEMISFERIUM

Although known as the astronomical ring, it is principally employed as an equatorial solar universal quadrant. Its use was widespread during 18th century.
It is composed of a ring that can be adjusted to various latitudes, a meridian ring showing the latitude scale, a moveable hour ring and a central, grooved bar that is graduated for the months of the year and a perforated cylinder, which moves over this. It will indicate the solar local time.
Price: £61.99 (Including VAT at 17.5%)

Planipherical Astrolabe Ref: LH-H22

HEMISFERIUM

The origins of the astrolabe were in classical Greece. It entered Europe from Moslem Spain with Latin words engraved alongside the original Arabic. Its peak of popularity was in the 15th and 16th centuries, when it was one of the basic astronomical education tools.
Astrolabes can be used to solve many astronomical problems that would otherwise require rather sophisticated mathematics. All of the everyday uses of the astrolabe are not known, but they were certainly used to tell time during the day or night, to find the time of sunrise and sunset, to locate celestial objects in the sky and also to determine aspects of horoscopes.
Size - Max Height 165mm, Diameter 140mm and 3mm Thick
Price: £106.00 (Including VAT at 17.5%)

Nautical Astrolabe Ref: LH-H23

HEMISFERIUM

This instrument is a reproduction of a Nautical Astrolabe in the National Maritime Museum of Greenwich. It was copied from a replica in the Naval Museum of Madrid. The nautical astrolabe is a simplification of the planispherical or astronomical astrolabe and its fundamental purpose is to obtain the latitude by observing the altitude of the sun or other stars such as the Pole Star.
Size - Max Height 125mm, Diameter 100mm and 10mm Thick
Price: £61.99 (Including VAT at 17.5%)

Nocturlabe Ref: LH-H24

HEMISFERIUM

This nocturnal watch --horologium nocturnale, noctilabium- is an astronomical instrument used to measure the time through the observation of the Pole Star and the position of bright stars in the celestial sphere.
This nocturnal is a reproduction of the one made in 1570 by Girolamo della Volpaia (History of Science Museum of Florence). Because it was made before the Gregorian reform (1582) and its creator had not very accurate calculation boards, to use this instrument correctly one must add 38 days to observation date.
Size - Max Height 165mm, Diameter 140mm and 3mm Thick
Price: £83.00 (Including VAT at 17.5%)

Sextant Ref: LH-H25

HEMISFERIUM

This instrument is a reproduction of an Octant of the mid 17th century. By semi-accurately measuring the height of stars or the sun, the Octant allows navigators to determine geographic latitude.
In 1731 John Hadley (England) and Thomas Godfrey (Philadelphia, U.S.A.), demonstrated the Octant, independently. The arc of an Octant is 45º or 1/8 of a circle (hence its name) and is divided into 90 parts each ½ degree. The Sextant (1757) replaced the wood frame with metal and progressively took the Octant´s place. It is still used today.
Price: £134.00 (Including VAT at 17.5%)

David Beringer's Quadrant Ref: LH-H26

HEMISFERIUM

This model is a reproduction of a mobile cubic quadrant that dates back to 1736, and is thought to be the invention of David Beringer of Hapsburg (Germany).
It is made up of an articulated arm, which allows us to incline the cube in a North-South direction, and a plumb line on the eastern side that moves along a graduated scale and can be used to adapt the instrument to the latitude of the measurer.
Price: £48.00 (Including VAT at 17.5%)

Perpetual Calender Ref: LH-H27

HEMISFERIUM

Only perpetual calendars meet the basic condition of permitting the deduction of any essential data from any other data (year, month, week and day). However, all the analogue perpetual calendars known are hardly perpetual since the limit of their calculations is about 50 years.
Our calendar starts at January 1, 1600, and ends at December 31, 2799. It is based on a repeating cycle of 400 years and a solar cycle of 28 years. It works by means of the "Dominical letter".
Price: £31.00 (Including VAT at 17.5%)

Quadrant - Capuccino Ref: LH-H28

HEMISFERIUM

The name is derived from the best known version of this solar clock, in which the path of the pearl in both tropics traces two lines that resemble the hood of Capuchin monks. The quadrant goes back to the 15th century, although the date is not precise.
This model is a sea-going, local-hour quadrant of a type called a clinometer. It is a reproduction and has been calculated for a latitude of 51.5º N
Price: £31.00 (Including VAT at 17.5%)

Augsburg Equinoctial Sundial Ref: LH-H30

HEMISFERIUM

Augsburg-made sundials enjoyed great popularity during the 18th century.
A little history
The Voglers contributed to the popularization of this instrument in the 18th century. They have a characteristic style of equinoctial sundial that became known as "Augsburg clocks" for the city in which they were made.
The lower part of the original instrument, contained the compass , with its casing inscribed with the latitudes of several important cities between 32º and 60º north .

Price: £62.99 (Including VAT at 17.5%)

Nocturnal and Tide Computer Ref: LH-H31

HEMISFERIUM

The piece is a replica of a Nocturnal and Tide Computer from 1570, signed by Humphrey Cole. Currently this instrument can be found in the British Museum, London.
One of its faces is a Nocturnal and the other is a Tide Computer. The Nocturnal or star clock is an artifact that is used to obtain the time at night using the fixed stars in the sky. The abacus or tide computer is used to figure the time of the tides that greatly affect navigation both in harbours and for fishing.
Price: £46.00 (Including VAT at 17.5%)

Astrolabe L.H.V Ref: LH-H32

HEMISFERIUM

A little history
This new astrolabe has the background of all existing astrolabes. The aim is to have a general design, with the aim of explaining how and what an Astrolabe can do with full explanations. This is astrolabe, an instrument designed for a 50,5º Lat which works correctly. It has a "general design" made after much study by Dr. Luis Hidalgo Velayos . The astrolabe has been designed and developed technically as a "new instrument" with the aim of sharing a good working instrument/tool and adding the explanations about its functions and making this understandable for a wide public.
There are many explanations and examples to show what one can do with an astrolabe: For example:

Hours of sunshine (from the dawn until nightfall).
Finding the time when we know the altitude of the Sun.

Nighttime chronometer:
The astrolabe can tell us the time not just during the day, but by taking on the role of a Nocturlabe will allow us to find the solar hour by taking readings from the stars, even if they are not circumpolar (one overtakes the other).
Examples of its topographical use :
Calculating the Height of a Tree Knowing the Longitude of its Shadow
Price: £69.99 (Including VAT at 17.5%)

Asineus Astrolabe 100mm Dia Ref: LH-A204

ANTIQUUS

The astrolabe is a fascinating instrument, one of the earliest analogue computers. It can be used for finding the time during the day or night, finding the time of a celestial event such as sunrise or sunset and as a handy reference of celestial positions. Mastering its uses can provide hours of interest and give a better understanding of celestial mechanics.
110mm diameter, 8mm plate.
Price: £92.00 (Including VAT at 17.5%)

Astrolabe 200mm Dia Ref: LH-A206

ANTIQUUS

This larger astrolabe has markings which are easier to read. It looks impressive on display and is sure to excite interest. Besides their use for determining astronomical events astrolabes were used as teaching tools in the late Middle Ages.
Height 250mm, diameter 200mm, thickness 12mm
Price: £129.00 (Including VAT at 17.5%)

Lunar and Tidal Calender Ref: LH-A211

ANTIQUUS

Use this beautiful lunar calendar to determine the phase of the Moon and to explore the relationship with the tides.
Diameter 100mm, thickness 8mm.
Price: £32.99 (Including VAT at 17.5%)

Equatorial Quadrant Ref: LH-A215

ANTIQUUS

Suitable for indoor use in a sunny position this sundial provides an attractive way of displaying solar time.

Price: £42.99 (Including VAT at 17.5%)

Small Armillary Sphere Ref: LH-A304

ANTIQUUS

Armillary spheres were developed by the Greeks in antiquity for use as teaching tools. In larger and more precise forms they were also used as observational instruments. The small armillary sphere is a fully working model that will look good in any home.
Height 350mm, diameter 210mm.
Price: £125.00 (Including VAT at 17.5%)

Large Armillary Sphere Ref: LH-A305

ANTIQUUS

Similar to the small armillary sphere above but larger and more impressive. The larger dials and markings make it easier to use.
Height 460mm, diameter 260mm.
Price: £150.00 (Including VAT at 17.5%)

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