Afonso Xavier Canosa Rodriguez


On philology, potatoes and construction.
Well, this is just my first approach to blog-writing. I want it to be the way to keep in touch with colleagues and friends.




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Clearing the soil of field bindweeds
To avoid entanglements in the harvester, this year a plow scratched the furrows in those areas, mainly close to the hedges, where bindweeds were thicker. To harvest the average field, at least four tractors were needed: one for the harvester (this year one was enough), another one to clear the ground from weeds and two to transport the crop (one is filled while the other goes to unload).
Subject: potatoes - Published 18-09-2017 21:45
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From forest to soil, on seeds
The year started going to the forest to cut trees that had fallen or were damaged by windy storms. The heating system at home is now more dependent on biomass than electricity.

We had several rainy weeks in a row by the time we use to start potato planting. Early potatoes will come later this year. I planted the last potatoes three weeks ago, using the same old tractor from previous years with a planting machine that requires only one person to plant, the driver.

Each year we use different certified seeds, sometimes coming from far away lands in different countries. Each certified tuber is inspected and processed to make for most often two or three new seeds, the potato being cut in smaller pieces, each one bearing at least two eyes. From these eyes, sprouts will emerge and the plant will grow, taking its energy from the seed. Tubers have a natural protection against microorganisms living in the soil, their peel. However, when we cut a potato to make two or three new seeds, we leave half or most of the surface unprotected, making the seed vulnerable to disease.

Wood ashes, on the other hand, bear no microorganisms at all, as a result of the high temperatures of combustion. So, before planting, seeds are covered with wood ashes that, due to the cut being wet, adhere to its surface, creating a new protective layer that keeps the seed away from open direct contact with the soil.
Subject: potatoes - Published 08-05-2017 22:41
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Harvest
It rained too often for the early season this year, the soil was too wet to plant. Harvesting started later than usual. I took part. We used two harvesters, the conveyor belt of the first one broke in the first rows. Grass was too thick and kept the soil from moving onto the trail. So did the second. And the first, once repaired again. Finally, plowing the land dug the weeds under the soil. After that, one harvester was enough to do the job. A crop of medium sized healthy tubers is a good end for a more difficult than usual start.
Subject: potatoes - Published 12-09-2016 22:15
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Refurbishment
The summer ended and autumn came while working in the refurbishment of a shop in a world heritage city.
Subject: construction - Published 26-10-2015 19:58
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Flowered plants

Some new potatoes, the ones planted earlier, have been already harvested (I came back in time). As for the late season, most of the plants have flowered. Their leaves slightly wet yesterday, early in the morning. It drizzled the night before, softly, for a while, as mist. So did yesterday, once more. Enough to refresh the surface, still too superficial to reach the root.
Subject: potatoes - Published 20-07-2015 18:16
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Ice on the river

Once solid soil to step on, ice melts again.
Winter is gone, in the river the water runs.
Subject: philology - Published 30-03-2015 12:56
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How long is a league?

We are talking about length, of course. Though, even after disambiguation, the answer may change depending on our definition. If we take metres to be the standard unit of length, “a unit of length equal to X metres” could be an acceptable definition. So easy, isn't it? Now we only have to answer the question, how many metres are there in a league?

Here is where we could get lost trying to be more precise again. Conversion values change from one place to another since the early periods of history. Furthermore, we would first need to use standard units other than metres, such as stades and feet, then convert to metres again.

So, here we are, tracking Mendes Pinto with distances given in leagues. The issue is that, after working with a huge bibliography, I haven't found a definitive explanation on how the values were calculated if any values were given at all. The most secure point I got is that of a league being equal to 17.5 intervals of a degree.1 Having this as a given value, I approached the issue as follows:

  • Mendes Pinto reports measures for distance and position being taken after the sun.

  • Now, what Fernão Mendes Pinto really measures is an angle of the Earth's circumference, taking relative positions on its surface with the sun as a point of reference.

  • The value of the sphere is well known for this period (Pedro Nunes, Sacrobosco), as nowadays, it has 360 degrees.

  • Now, FMP is giving distances proportional to 360/17.5. FMP doesn't need to know how long planet Earth is on the meridian, he just measures parts of it and calls a unit of length in his path a league. This universal unit would be finally transferable to whatever the local common unit of length, be it stades, feet, and so on.

  • Since we want to know the value nowadays, we don't need to solve how many stades or feet a league has either. It is enough to know the value of what FMP measures in metres, that is, the circumference of Earth, which is 40,000,000 m (round number, so a metre can also be exactly defined after the distance between the poles and the equator).2

  • Now, the maths. 40,000,000 m % 360° = 111,111.1 m, that we further divide 111,111.1 % 17.5 = 6,349 m (6,350 m for the length of Earth's circumference being equal to 40,007,863 m.)

Therefore, following this approach, a league is 6.349 km.

Let's check it! According to FMP, distance from Nanjing to Beijing is 180 leagues. So 180 leagues x 6.349 km = 1,142.82 km. Actual distance, round number, 1,150 km!3

More examples needed to actually bring evidence. Close enough to be on the right track!




(1) Albuquerque, L. (1987). As navegações e a sua projecção na ciência e na cultura. Lisboa: Gradiva. P. 49. ^

(2) Wikipedia. Sub voce Earth. http://en.wikipedia.org/wiki/Earth ^

(3) Alves, J. (ed.) (2010). Fernão Mendes Pinto and the Pegrinação. Lisbon: Fundação Oriente. (Notes by M. Ollé, Vol. III, p. 126) ^


Subject: philology - Published 29-12-2014 10:47
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More on Travels

Last week I had the privilege to participate in a colloquium again. The topic was place names identification in Mendes Pinto's travels.


This is a synopsis:

"We present here our current work on a positivist analysis of place names. It aims to be valuable for either a literary reading or a more strict historical and geographical interpretation of Pinto's work. We sketch three methods to trace a place name.

1) Through phonetic analysis, does a given place name match a geographical entity in an Asian language?

2) By examining context, do we find historical, ethnographic, topographic, architectural, any descriptive features to relate the place name to a particular geographical area?

3) Given a point of reference and a vector of displacement, is it possible to solve the place name through cartography? "


A pdf file with slides is available here.

Subject: philology - Published 24-11-2014 13:49
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Autumn

Many miles away, autumn may-trees,
bore sweeter berries, less lobulated leaves.
Subject: philology - Published 27-10-2014 14:06
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...and again
Only one more day. Yet one year more.
Subject: potatoes - Published 18-08-2014 12:00
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Harvesting again
Having been away for ten months, there is not much for me to do this time of the year. I just offer a helping hand to cut and pick up some logs from trees the wind brought down and spend two more days harvesting potatoes on two small pieces of land.
Subject: potatoes - Published 28-07-2014 17:27
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Modular building
Two days only, as a visitor, to see the final building process of a modular house still indoors, another day to visit a house yet to be finished, though already installed on the building site.
Subject: construction - Published 28-07-2014 16:37
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