Sundial consulting

Inverkeithing Mercat Cross – sundial restoration complete

Inverkeithing Mercat Cross, the capital stone, cube sundial, and unicorn fully restored.

The Inverkeithing Mercat Cross is a tall stone column in the centre of the town. The capital stone, cube sundial, and unicorn sculpture are at the top of the column. There has been no ‘Cross’ as a Christian symbol on the column since the Reformation. Photo: Graciela Ainsworth.

The Inverkeithing Mercat Cross is a tall and handsome piece of historic town architecture. The Mercat Cross in Scottish towns was a symbol of licensed authority to trade in goods, and the trading place was at the Cross. The sundial would be a 17th century addition, now fully restored, together with the heraldic capital stone and the symbolic unicorn of Scotland.

The sundial is a cube stone which is ideal for a prominent place in a town. It is visible from all sides and it shows the time at all hours of the day. Continue reading

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Haddo House cube stone sundial restored and reading solar time

Haddo House stone cube sundial

This sundial cube stone has fine carving detail. Each of five faces can read the time. The horizontal dial carved in the stone on top indicates an ornamental piece for a garden. A cube set on a tall pillar or on a wall will have the side dials only. Photo: Graciela Ainsworth.

This cube stone sundial stands in the garden of Haddo House, the National Trust for Scotland property in Aberdeenshire. When we examined it at the workshop, it had broken and missing gnomons and moss obscured the dials. After restoration the dials can now read solar time properly again.

A cube dial has the mathematical attraction of reading time by the sun on south, east, west, and north faces. As a result, as the sun moves round, the cube sundial is an excellent device for showing time Continue reading

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Restoration of Inverkeithing Mercat Cross, finding true North

The azimuth sundial instrument

The azimuth sundial used as a measuring instrument for finding north. The cursor is set for the date, the cursor arm is turned to set the time. The gnomon shadow and cursor are in line.

The Mercat Cross at Inverkeithing in Scotland is a tall stone column that dates from the 14th century. The top of the column has a sundial stone in the form of a cube and a unicorn. Restoration of the whole column is now complete. To re-install the sundial stone correctly we had to find a true north line.

The north line is the direction that shadows will fall at noon, and Noon is the exact time of day when the sun is in the south. Continue reading

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Sundial stones in a Scottish garden — the restoration

Ancient sundial pillar after restoration

A falling tree broke off the top of this pillar in Storm Arwen. The two sundial stones fell down to the ground. The pillar now has a new top section matched to the original stone. The sundial sections are clean and restored.

In November 2021, Storm Arwen caused serious damage with very strong winds especially in eastern Scotland. On one country estate an oak tree crashed onto this historic sundial in the family garden. It smashed the ancient pillar supporting the sundial stones. The family wanted to see the sundial fully restored. Continue reading

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Sundial stones found in a Scottish garden — the cruciform stone

Cruciform sundial stone

The cruciform stone has four concave sides leaving four curving arms between them, thus creating the cross shape. This particular stone has a small concave end on each curving arm [not visible in the photo]. So the single stone has eight dials, on four large concave sides and four small ones. [Note: the shadow in this photo is from indoor lighting not from the sun.]

The cruciform type of sundial stone is a clever idea. During the day, as the sun moves round, each of the dials in turn will show a shadow and indicate the time. The straight dial edges cast the shadows. A cruciform stone can be on a lectern sundial but this one appears unique. Continue reading

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Sundial stones discovered in a Scottish garden — the stone globe

Globe terminator stone sundial

The globe sundial will show light and dark sides of the stone in sunshine. The terminator line separates the two and the hour numbers show the time.

This stone globe was initially puzzling. It has a band of hour numerals and looks like a type of sundial. It is actually a globe terminator dial. The hour band lies parallel to earth’s equator, and the line between light and dark shadow in sunshine is the terminator. The puzzle was why the globe had a second sundial  stone fixed onto it, since removed in the workshop, as a later post will explain. Continue reading

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Calibrating a new obelisk sundial in stone

Inclined test dial facing east

This dial stone is a test piece for the new obelisk sundial, and is on a board at the correct angle for one of the faces of the obelisk. It faces East and inclines 61° to horizontal so the shadow of the temporary plastic gnomon will show the time.

Obelisk sundials carved in stone were popular in Scotland in the 17th and 18th centuries. Quite recently stonemasons in Fife have done the work to carve a new obelisk sundial for one of their clients. Its dials have remained blank for mathematical calibration. Macmillan Hunter are responsible for the calibration and have supplied detailed dial instructions and drawings for the mason to use together with the required set of geometric bronze gnomons. Continue reading

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North alignment on a Victorian pedestal

Sun direction measured with an angle finder

The direction of the sun measured against one edge of the octagonal stone pedestal using the angle finder and light slit

A Victorian sundial pedestal stands in the gardens of Riccarton estate outside Edinburgh. It once held a beautiful octagonal dial which is now in safe storage. A replacement dial is to go on show and it must be in a correct orientation. The gnomon on a sundial must point north. A wrong alignment will make the sundial inaccurate, and nothing on the 19th century pedestal actually marks the north. Continue reading

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Historic Scottish Stone Sundial Restored

Scottish stone sundial restored

The octagonal base and baluster shaft support a carved cube stone. Before restoration the stones were covered in moss lying on the ground in the owner’s garden. The bronze horizontal dial is new.

Stone sundials were common in Scotland in the 17th and 18th centuries. They stood in the gardens of great houses, and in public places. The geometric form of the sundial would reflect the popular interests of the day in science and mathematics, and many displayed complex multiple dials. Originally this particular sundial may have belonged to a country estate near Falkirk. The present owner has had it for many years and in 2023 decided to restore it. Continue reading

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Skein of geese art installation at RSPB Loch Lomond

Skein of geese art installation at RSPB Loch Lomond

Skein Dial, Hannah Imlach, 2023. Art installation and sundial at RSPB Loch Lomond, with the artwork constructed in Corten steel in the foreground and the towering mass of Ben Lomond in the distance. This is a remarkable piece that captures the ephemeral impression of geese in flight and shows the dates when they migrate by a sundial shadow. Photo: Hannah Imlach

In November 2022 visual artist Hannah Imlach approached us to talk about an art installation she had in mind for the RSPB Nature Reserve at Loch Lomond. The reserve is a prime site where Greenland White-fronted geese come and overwinter. Hannah’s concept for her artwork was a visual image of skeins of geese flying in the sky combined with a sundial showing the times when the geese arrive and leave. White-fronted geese migrate from Greenland in the autumn and return there in the springtime to breed. Continue reading

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