fbpx

Category: engineering

Posted on

The Scots invented everything

Narrow roads, lochs, mountains, the sea, and a pint. The road from Edinburgh to Iona is beautiful no matter the season.

Sheep ambling down to the pub at Fionnphort. Photo courtesy Douglas J. Perot.
I drove from Edinburgh to Fionnphort just three years ago. This year, I relaxed as others managed logistics. At the Green Welly, one of our party purchased a CD of traditional Scottish songs. Amazing Grace was the last tune, and we all sang as we climbed the last rise to Fionnphort harbor. Single-track roads in the UK can make an atheist pray.
The subtext of this week’s trip has been, “The Scots invented everything,” which seems very nearly true. The Scottish Enlightenmentwas part of a worldwide outpouring of ideas. In Scotland, that took a particularly practical bent. Their chief aim was improvement, virtue, and practical assistance. Matters like lighthouse design were not too plebian for Scotland’s greatest thinkers.
If you head to the Hebrides, you go on a boat operated by Caledonian MacBrayne. This company has been in operation since 1851, although it had a period of government ownership from 1973-2006. As with most ferries, it’s a monopoly. A ditty around here goes:
The Earth belongs unto the Lord
And all that it contains
Except the Kyles and the Western Isles
And they are all MacBrayne’s.

Eilean Musdile light, designed by Robert Stevenson. Photo by Carol L. Douglas
Two waters intersect across a bar on the route of the Oban-to-Mull ferry. On either side, there’s a lighthouse standing atop a rock.  Eilean Musdile is the larger of these two. It stands at the mouth of Loch Linnhe and has a prehistoric standing stone as well as other ruins. Its lighthouse was built by Robert Stevenson in 1833.
The Stevensons are famous for their literary son, Robert Louis Stevenson, but they were known in their day as great lighthouse engineers. Robert Stevenson learned his trade from his stepfather Thomas Smith, an engineer with the Northern Lighthouse Board. At the tender age of 19 he was entrusted to supervise the Clyde Lighthouse construction on Little Cumbrae in the Firth of Clyde.
Bell Rock Lighthouse, 1819, watercolor and gouache on paper, JMW Turner, courtesy Scottish National Gallery
His most famous work was the Bell Rock lighthouse. Balanced on a partly-submerged reef, its construction was risky and difficult. It was done so precisely that its masonry has endured for more than 200 years. Robert Stevenson invented the flashing lights that are still used on lighthouses. He also designed and built roads, bridges and other public structures.
In 1797, Stevenson married his step-sister. Three of their sons, Alan, David, and Thomas(RLS’ father), became lighthouse engineers as well. David’s sons carried the lighthouse business into the fourth generation.
Celtic cross on Iona, under last night’s waxing moon. Photo courtesy Douglas J. Perot.
Opposite Robert Stevenson’s Eilean Musdile light is the smaller Lady’s Rock, which is submerged at high tide except for its small lighthouse. This rock has a romantic Scottish tale attached to it. Lachlan Cattenach was a Maclean of Duarton nearby Mull. He was unable to father a boy and blamed his wife, Catherine. He left her on the rock to await the incoming tide, taking care that it should look like an accident.
Lachlan duly reported her death to her brother, the Earl of Argyll. Later, the earl invited Lachlan to supper, where the scoundrel found Catherine seated next to her brother at the high table. Lachlan was allowed to leave unharmed, but was later found murdered in Edinburgh.
Posted on

Art, engineering and gender

The same principles apply across all creative ventures. So why don’t women follow the money?

This way blindness lies…
I’m in the midst of foot surgeries. As you can imagine, I got bored before I got mobile. My daughter is getting married next month, so it was a good time to do handwork for her wedding. I started with fringing shawls for the distaff side of the bridal party. I could do that with my foot elevated.
The artist is intrepid at making stuff. We simply don’t see lack of experience as a problem. We’re often working in areas we’ve never been in before.
Fringing the shawls was tedious but required little actual skill.
Sewing, however, is something I can do just fine. If there was money in it, I might have been a couturier rather than a painter. From fringing, I moved on to making the ring-bearer a tartan bow-tie from the scraps of his sister’s shawl. Then, since the mess was all out anyway, I started the flower-girl’s dress. All this has been drawing me upright. I work until my foot throbs and then stop.
The bow-tie took a little more experience.
Grace’s dress is meant to be a miniature of the bride’s dress. It has a bouffant skirt with horsehair braid on the top layers of tulle. I like this new use for an old material very much, but it’s hard to scale it to a two-year-old.
A two-year-old cannot go strapless, for engineering and other reasons. A train is also out of the question. And somewhere I need to incorporate a big pink bow, which the bride’s dress doesn’t have. As you can imagine, there is only so far a pattern can take you, and we’ve long passed that point.
Barb Whitten’s paper sneakers. A woman who can make those can make anything.
I copied the first four layers easily enough, but the top layer baffled me. I called artist Barb Whitten for help. She sculpts, so she can think in 3D. She had the layer figured out in minutes. There were eight panels, each with a 90° arc, which meant the skirt encompassed 720° of fabric.
I ran it past another friend, a seamstress and Civil War reenactor. “You realize I had to convert that to 19th century terms, don’t you?” she said. The penny dropped for me. When I saw that wedding gown as a variation on a Victorian gown, the layers made sense.
In the end, it all comes down to craftsmanship.
But to scale it down and cut the pieces freehand required trigonometry. I don’t care if you call it math or you call it “Granny drawing out a pattern on the table.” It’s the same thing. I guessed it, and then I calculated it, and my numbers were right to a quarter of an inch. So I cut it and sewed it.
Women have been doing this work since the dawn of time. It’s not much different from carpentry. It starts with a vision, which is then sketched, measured and constructed.
That’s also how engineering works. So why are women so skittish about entering engineering as a field? Historically, women have participated in science and engineering at much lower rates than men. That’s sad, because those jobs pay well and are in demand.
Posted on

Nothing new under the sun

Leonardo da Vinci’s Vitruvian Man was based on book III of De Architectura. Vitruvius said the human figure was the principal source of proportion for the classical orders of architecture.
The art of hydraulic cement was lost after the fall of the Roman Empire and not rediscovered until 1756, but if people had just read their Vitruvius, the recipes were in there all along.

Sandy Quang (who is writing her Master’s thesis) prefers her Vitruvius aloud so I’ve listened to quite a bit of his De architectura in recent months. He’s such a lucid writer that I have no trouble following it while driving. What’s amazing is how much of what he describes hasn’t changed in almost 2100 years.

1521 edition of De architectura, translated and illustrated by Cesare Cesariano
Very little is known about Vitruvius’ life. He was born about 80–70 BC and died sometime after 15 BC. He was some kind of praefect, but whether that was in the army or civilian life is not clear. He was mentioned by Pliny the Elder and Frontinus, but even his cognomen (surname) and first names are uncertain.
What an amazing mind Vitruvius had! He not only wrote; he practiced his craft. As an army engineer he specialized in the construction of ballista and artillery. He described the building methods of foreign tribes throughout the Roman Empire, from which it can be inferred that his service was broad. And somehow, he had the time to write this ten-volume treatise on architecture, which is the only surviving classical text on the subject.

Triumph of Neptune standing on a chariot pulled by two ichthyocentaurs, Barthos and Aphros, third century AD. It was built as per Vitruvius’ instructions, and if you were inclined to make one today, you’d use essentially the same technique. (The fundamental absurdity of ichthyocentaurs is not an architecture question, so Vitruvius would have had no advice about whether or not to include them.)
Ancient Roman architects had a broader remit than our modern equivalents, being responsible for engineering, urban planning, materials, HVAC, acoustics, plumbing, and a whole host of other sub-specialties. De Architectura attempts to break down this massive field and describe it in simple, comprehensible terms.
Sandy has read to me from the books on materials and pavements and decorative plasterwork (which relate to her particular interest in Roman mosaics). Having done my share of construction and plastering, I’m pretty familiar with how we use those materials today. Other than adjustments for climate, it’s shocking how little has changed.
An ancient Roman concrete vault in Rome, from the Basilica of Maxentius and Constantine, c. 312 AD. Can we possibly improve on concrete structures that lasted two millennia?
We don’t seem to produce such brilliant generalists in the modern era. I wonder why that is? You can read De architectura here.
Let me know if you’re interested in painting with me in Maine in 2014 or Rochester at any time. Click here for more information on my Maine workshops!