This basic course in early modern European history is being given at Tel Aviv University in the first semester, Mondays and Thursdays, from 1400-1600, in Room 305, Gilman Building.
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posted Nov 25, 2013, 3:03 AM by Professor Katz
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updated Nov 25, 2013, 11:30 AM
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Columbus noticed something very odd on his third voyage to the New World (1498-1500): his compass didn't always seem to work very well. When he passed 'the line from north to south a hundred leagues west of the Azores' in a westerly direction, 'the needle shifted by a quarter north-westwards, and continued to shift farther to the north-west as we sailed on.' What Columbus discovered was what used to be called the 'Line of No Variation', and is now referred to as the 'Agonic Line', i.e. 'the line having no angle'.
As it happens, your compass needle will point to the actual North Pole in only a few places on the globe, and if you draw a line through those points from north to south, you get an Agonic Line. West of that line, the magnetic N on your compass will increasingly point to somewhere east of the North Pole. If you are east of an Agonic Line, then the magnetic N on your compass will increasingly point to somewhere west of the North Pole, and it only gets worse the farther away you get from the Line. This phenomenon is very dramatic in the United States:
The bigger problem is that the location of 0 degree Agonic Lines changes over time, since the magnetic North Pole is always on the move, and is never exactly in the right spot, thanks to movement in the molten metallic core of the earth:
In Europe, the same phenomenon exists, of course, but the difference between True North and Magnetic North is not as severe, although it increases dramatically towards the poles.
If you don't have a GPS you will need to take all of this into account when you go hiking, especially in the USA. If you are in Washington State, the magnetic N on your compass will point up to 20 degrees east of True North ... and if you are in Maine, the magnetic N on your compass will point up to 20 degrees west of True North. If you don't know this, you could get very badly lost.
In Israel, the difference is only a little over 4 degrees, so it's not such a big deal. You just need to remember that True North is a little over 4 degrees less than what you are seeing as the direction of the magnetic red N, so just turn your compass a little over 4 degrees in a counter-clockwise direction so that the red N appears 4 degrees to the right of the arrowhead.
If you want to know how to calibrate your compass, wherever you are, click here. It could save your life ... unless you have a GPS ... or prefer to stay at home studying interesting subjects such as the Agonic Line. |
posted Jul 24, 2013, 12:07 AM by Professor Katz
posted Jul 8, 2013, 2:17 AM by Professor Katz
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updated Jul 8, 2013, 2:18 AM
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...well, not exactly, having met a fiery end while assisting in a public ceremony at the Campo de' Fiori in Rome. But his memory lives on, as evidenced by this bit of graffiti I saw on a wall in Palermo in June 2013: |
posted Jan 13, 2013, 1:50 AM by Professor Katz
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updated Feb 18, 2013, 11:52 PM
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Alfonso de Zamora (c.1474-1544), the convert from Judaism who became professor of Hebrew at Salamanca, helped Cardinal Ximenes with the polyglot Bible. He also wrote some Hebrew letters, including the one in which he complains that he never had a good day in his life. I attach the text. Read it, if only to see how much fifteenth-century Hebrew looks like modern Hebrew. The complaining letter is on page 414. |
posted Dec 18, 2012, 12:15 AM by Professor Katz
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updated Dec 18, 2012, 12:40 AM
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Evil, Scary Flea (left) Nice, Friendly Rat (right)
As we learned, fleas played the most important part in the transmission of plague, and rats were victims as well, innocently providing transport. The fleas carried plague bacteria, and their bites injected it into the bloodstream, causing infection. The spread of the epidemic relied on two different rodent populations: one that was resistant to the disease and therefore carried it as hosts; and a second that lacked this resistance and died, passing over into Rat Heaven. When the supply of rodent victims became too small, the fleas hopped over onto other hosts, including people, resulting in a human epidemic as folks got bitten and infected.
It's true that some rats can cook. But even fleas are not all bad. They have a circus:
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posted Nov 11, 2012, 1:56 AM by Professor Katz
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updated Nov 11, 2012, 2:06 AM
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You'll remember that a big part of being a Humanist was to walk the walk and talk the talk: about the way you divide history, about how much you love ancient Greek, and about the 'dignity of man' (women not included). We do have a guidebook to being a Humanist, Il Libro del Cortegiano ('The Book of the Courtier'), written by Baldassare Castiglione (1478-1529) and published in Venice in 1528.
Sadly, we lack a sixteenth-century instructive video on 'How to Spot a Humanist', so we'll have to make do with one of the United States Armed Forces Information Films, released in 1950. Many of the same principles apply:
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posted Oct 24, 2012, 12:38 AM by Professor Katz
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updated Oct 16, 2013, 12:20 AM
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Before Istanbul was Istanbul, it was Constantinople...and before that it was Byzantium...and even before that it was Byzantion, a 7th century BC Greek city-state.Very confusing. Four names for the same place. Perhaps this song will clear things up:Istanbul (Not Constantinople) was first recorded by The Four Lads, a Canadian group, in 1953. (They were originally known as 'The Otnorots' ... that's Toronto backwards, get it?)
Anyway, you might know the later version, released by They Might Be Giants in 1990.
Here are the lyrics:
Istanbul was Constantinople
Now it's Istanbul, not Constantinople
Been a long time gone, Constantinople
Now it's Turkish delight on a moonlit night
Every gal in Constantinople
Lives in Istanbul, not Constantinople
So if you've a date in Constantinople
She'll be waiting in Istanbul
Even old New York was once New Amsterdam
Why they changed it I can't say
People just liked it better that way
So take me back to Constantinople
No, you can't go back to Constantinople
Been a long time gone, Constantinople
Why did Constantinople get the works?
That's nobody's business but the Turks
Istanbul (Istanbul)
Istanbul (Istanbul)
Even old New York was once New Amsterdam
Why they changed it I can't say
People just liked it better that way
Istanbul was Constantinople
Now it's Istanbul, not Constantinople
Been a long time gone, Constantinople
Why did Constantinople get the works?
That's nobody's business but the Turks
So take me back to Constantinople
No, you can't go back to Constantinople
Been a long time gone, Constantinople
Why did Constantinople get the works?
That's nobody's business but the Turks
Istanbul
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posted Oct 22, 2012, 11:41 AM by Professor Katz
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updated Nov 19, 2013, 11:46 PM
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posted Jan 20, 2011, 2:32 AM by Professor Katz
Pierre d'Ailly, Imago Mundi [Image of the World] (1480) was one of the books that Christopher Columbus read and annotated while planning his great voyage. As it happened, d'Ailly thought that the Atlantic Ocean was not so very wide. Columbus used d'Ailly's book to calculate that each degree of longitude along the Equator was the equivalent of 56.67 Roman miles...and this error led Columbus to underestimate the circumference of the earth by about 25%. If he knew it was such a long journey to the other side, he might not have started it in the first place.
Here is the book itself, with Columbus's annotations:
In his copy of this book, and in other places, Columbus inscribed his signature:
No one can quite figure out what it means. The last line is "Christoferens" = "bearer for Christ". What that little pyramid of letters above it is...who knows? Some people think it is the beginning of a Hebrew prayer. Maybe something more Christian.... |
posted Jan 16, 2011, 2:33 AM by Professor Katz
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updated Jan 16, 2011, 2:36 AM
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**משך הבחינה: שלוש שעות
**אין להשתמש בחומר עזר כלשהו
++++ חלק א' [% 20] - הגדר בקצרה (3-4 שורות) עשרה
מתוך השמות והמושגים האלה:
++++ חלק ב' [% 30] - להלן 4 חיבורים המופיעים בביבליוגרפיה כ"קריאה חובה".
עליך לבחור בשניים מהם ולהציג בקיצור את הטיעונים העיקריים שמעלים
המחברים.
++++ חלק ג' [% 50] - עליך
להתייחס בהרחבה לאחד הקטעים הבאים:
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