Tyrtylius' records

Half-halfling, half-elf wizard of the geomancer variety.

Faithfull scribe of the Noldor Calastir, Dark Lord of the Phallic Symbols. Currently living in his tower, trying to manage his household and estate while he searches for a cure for old age for his somnostatic human wife, the warpriestess Zena.

Science

alchemy, anatomy, astronomy, geography, mathematics, herbology, maps, mycology, language, script, technology,

History

history, History of Europe, History of Africa, history of America

Mythology

mythology, mesopotamian mythology, egyptian mythology, greek mythology, celtic mythology, norse mythology, japanese mythology, west-african mythology, gods, mythical creature,

Magic, folklore and ritual

magic, shamanism, curses, runes, tarot,folklore,magical plant, wizards workshop

Arts and crafts

theater, manuscript, illumination, sculpture, jewelry

nihtegale:

Zodiac Man, 15th century

(via medieval)

spring-of-mathematics:

The Beauty of Math in Science - Lissajous Curve

Lissajous curve, also known as Lissajous figure or Bowditch curve, is the graph of a system of parametric equations: x = A.sin(a.t + δ) and y = B.cos(bt)
The appearance of the figure is highly sensitive to the ratio a/b - Image 3 (3/2, 3/4 and 5/4). For a ratio of 1, the figure is an ellipse, with special cases including circles (A = B, δ = π/2 radians) and lines (δ = 0). Another simple Lissajous figure is the parabola (a/b = 2, δ = π/4). Other ratios produce more complicated curves, which are closed only if a/b is rational. The visual form of these curves is often suggestive of a three-dimensional knot, and indeed many kinds of knots, including those known as Lissajous knots, project to the plane as Lissajous figures.

Visually, the ratio a/b determines the number of “lobes” of the figure. For example, a ratio of 3/1 or 1/3 produces a figure with three major lobes (see image).  The ratio A/B determines the relative width-to-height ratio of the curve. For example, a ratio of 2/1 produces a figure that is twice as wide as it is high. Finally, the value of δ determines the apparent “rotation” angle of the figure, viewed as if it were actually a three-dimensional curve. For example, δ=0 produces x and y components that are exactly in phase, so the resulting figure appears as an apparent three-dimensional figure viewed from straight on (0°). In contrast, any non-zero δ produces a figure that appears to be rotated, either as a left/right or an up/down rotation (depending on the ratio a/b).

See more at source: Lissajous curve.

Images: 3D Lissajous curve - Lissajous curve - How to Make a Three-Pendulum Rotary Harmonograph by Karl Sims.

(via thenewenlightenmentage)

trigonometry-is-my-bitch:

A  Bézier curve is a mathematically defined curve used in computer graphics and similar applications. The curve is defined by four points: the initial position and the terminating position (which are called “anchors”) and two separate middle points (which are called “handles”). The shape of a Bézier curve can be altered by moving the handles.

The mathematical method for drawing curves was created by Pierre Bézier in the late 1960’s for the manufacturing of automobiles at Renault.

(via thenewenlightenmentage)

visualizingmath:

Many Different Ways of Obtaining an Ellipse

In mathematics, an ellipse is a curve on a plane surrounding two focal points such that a straight line drawn from one of the focal points to any point on the curve and then back to the other focal point has the same length for every point on the curve. As such, it is a generalization of a circle which is a special type of an ellipse that has both focal points at the same location. The shape of an ellipse (how ‘elongated’ it is) is represented by its eccentricity which for an ellipse can be any number from 0 (the limiting case of a circle) to arbitrarily close to but less than 1.

There are many different ways of forming an ellipse. Above are a few examples!

In order:

  1. An animation of the Trammel of Archimides.
  2. An animation of Van Schooten’s Ellipse.
  3. An ellipse as a special case of a hypotrochoid.
  4. Matt Henderson’s animation of a curve surrounding two foci.

Can you think of other ways of forming an ellipse (there’s a really obvious method that isn’t listed above…)?

(via thenewenlightenmentage)

odditiesoflife:

Vintage View of Female Anatomy

For centuries the presumption was that the vagina was an inverted interior penis and testes. In fact the fallopian tubes did not get their name until Gabriele Fallopio discovered them in the late 1500s. With the 17th century came the coining of the term ovaries. A 17th century engraving from Casserio’s theatrum anatomicum depicts a serene woman with an open flower in the center of her abdomen exposing a fetus. The petals are labelled A-G revealing the order of the artful cuts of Casserio’s dissection.

odditiesoflife:

18th Century Midwife Teaching Model

Angélique-Marguerite du Coudray was a famous 18th century midwife and designed this medical model to teach midwife trainees about delivering babies. Louis XV learned of her expertise and asked her to set up courses throughout France. From 1759-1779, she traveled the country with her mannequin and published her Abridged Art of Chid Delivery.

source

erikkwakkel:

Medieval cartoon

These charming images from medieval medical books show something you don’t often see depicted in this age: foetal positions in the womb. The drawings range from the 10th to the 15th century but they show more or less the same scenes. What is most striking, of course, is that the babies-to-be are simply miniaturized adults, which is how children are often depicted in medieval illustrations. There is something oddly entertaining - and strange - about these tiny people. The top image in particular has an almost cartoon-like appearance: if it wasn’t for the Middle English text around it, the drawings could well be modern. A short story in four frames of a tiny naked person doing exercises on a pink yoga mat.

Pic: London, British Library, Sloane MS 2463, 15th century (top, more here); Brussels, Koninklijke Bibliotheek, MS 3701-15, 10th century (lower left, more here); Oxford, Bodleian Library, MS Laud Misc. 724 (lower right, more here). Here is a nice piece on medieval twins, which features other images.

cultofweird:

Exquisite, disturbing objects from 500 years of human anatomical science. Article here.

Weird news and oddities from Cult of Weird

(via scientificillustration)

corporisfabrica:

An exploded view of the bones of the skull
from Intermediate anatomy, physiology and hygiene (1887) by J.C. and C. Cutter. Though it is easy to think of the cranium as a single hollow bone, this is not in fact the case. Indeed, at one point in your life, these bones existed as entirely separate, independent structures.

(via scientificillustration)

rindertjagersma:

Hippocrates - Amsterdam, 1616

translation of the visible tekst (by me):

About the wounds

… had / and that for sure as big / as two mans heads / and more. And in the year 1562 have I / in presence of M. Frans van Couwenberghe / and M. Andries de Labite surgeons at Eppeghem / a village between Brussels and Mechelen seen a child of four years / or thereabouts / that had a head of such shapes / and also big beyond measure/ of which we also give the image here. And though Hippocrates writes that the …

corporisfabrica:

From Anatomie normale du corps humain: atlas iconographique de XVI planches, Sigismond Laskowski.

(via thenewenlightenmentage)

syldoran:

medicalschool:

A child’s skull prior to loosing it’s baby teeth

children are terrifying little hellbeasts and I want you all to know this from a medical standpoint

(via krakensdottir)

nihtegale:

"Alexander being lowered into the sea in a cask, with the queen and her lover attempting to drown him by cutting the chains that support the diving bell. Alexander is saved by the knowledge that if he kills the cat that accompanies him, the sea which cannot tolerate blood, will throw the bell."

nihtegale:

Diver with an air reservoir.

Diving gear, page 92v from ‘Kriegsbuch’ (UER MS.B 26) by Ludwig von Eyb zum Hartenstein, 1500.

Source (and many more pictures!): http://digital.bib-bvb.de/view/bvbmets/viewer.0.5.jsp?folder_id=0&dvs=1409063309082~455&pid=4555786&locale=de&usePid1=true&usePid2=true

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