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Videos tagged with mit (1038)

Letterlocking: Marie Antoinette's removable paper lock, France, 18th century

Letterlocking: Marie Antoinette's r...

Letterlocking

Added 4 days ago | 00:02:31 | 107 views

A letter from Marie Antoinette, Queen of France, to Cardinal Ignazio Boncompagni Ludovisi, Rome, Italy. 1782. The "Removable Paper Lock" format was used as ceremonial-type correspondence was used by French Kings (Louis XIV, Louis X,...

Document in a textile bag

Document in a textile bag

Letterlocking

Added 15 days ago | 00:00:27 | 107 views

Letterlocking: Document in a Textile Bag, Italy. 1578. Was this once a locked document? Did the textile bag serve as an envelope and was once sewn shut? The original is found in the Vatican Secret Archives, Fondo Veneto, Sezione II, Con...

Letterlocking: Blank Margin Lock

Letterlocking: Blank Margin Lock

Letterlocking

Added 15 days ago | 00:04:45 | 112 views

Letterlocking: Blank margin lock. Model of the highest level of built-in security found in letterlocking since the paper lock remains attached to the actual letter it is securing shut. Sir Robert Harley, Misc 28, Letter 2 of Hry Howard ...

MITEI Future of Solar National Press Club Presentation

MITEI Future of Solar National Pres...

Future of Solar Energy Study

Added 19 days ago | 01:17:30 | 190 views

Semaphore spinning wheel, 1960s

Semaphore spinning wheel, 1960s

MIT Libraries. Movable Messages in Books: Spinning Wheels, Coded Disks, and Volvelles

Added 1 month ago | 00:00:13 | 360 views

This small pocket-sized device shows the alphabet as it’s signaled using semaphore flags. Turn the dial, and look in the window by the sailor’s right foot to see the letter he’s signaling. (Turn the disk around, and you’ll see what the f...

The Mariner's Compass' rectifier as a spinning wheel in a book, 1756

The Mariner's Compass' rectifier as...

MIT Libraries. Movable Messages in Books: Spinning Wheels, Coded Disks, and Volvelles

Added 1 month ago | 00:00:06 | 467 views

Andrew Wakely, a mathematician, first published The Mariner’s Compass Rectified in 1694. The book was extremely popular; dozens of editions were printed over the course of nearly a century. The “rectifier,” shown here, is used to “readil...

Charles Wheatstone's "The harmonic diagram" spinning wheel, 1824

Charles Wheatstone's "The harmonic ...

MIT Libraries. Movable Messages in Books: Spinning Wheels, Coded Disks, and Volvelles

Added 1 month ago | 00:00:14 | 331 views

This device was used in the 19th century for teaching music theory, and was created by a notable inventor and physicist, Sir Charles Wheatstone (1802-1875). Among other things, the Harmonic Diagram could be used for transposing music fro...

Le Grand Guidon et tresor journalier des astres, 1680s

Le Grand Guidon et tresor journalie...

MIT Libraries. Movable Messages in Books: Spinning Wheels, Coded Disks, and Volvelles

Added 1 month ago | 00:00:11 | 249 views

This double-sided volvelle is from Le Grand Guidon et Tresor Journalier des Astres, published in Rouen in 1680 by Jean Oursel. One side of the volvelle is a perpetual calendar; the other gives the phases of the moon and astrological info...

Pierre Galtier-Boissière spinning wheel in Procèdés et applications de la sématotechnie, 1883

Pierre Galtier-Boissière spinning w...

MIT Libraries. Movable Messages in Books: Spinning Wheels, Coded Disks, and Volvelles

Added 1 month ago | 00:00:06 | 426 views

Pierre Galtier-Boissière wrote on a wide range of topics including alcoholism, gout, and language. This book on a new form of shorthand was supposed to make learning “fun,” and presumably this volvelle, with its unique design, supplied a...

The many spinning wheels in Le grand guidon et tresor journalier des astres, 1680?

The many spinning wheels in Le gran...

MIT Libraries. Movable Messages in Books: Spinning Wheels, Coded Disks, and Volvelles

Added 1 month ago | 00:00:19 | 295 views

This double-sided volvelle is from Le Grand Guidon et Tresor Journalier des Astres, published in Rouen in 1680 by Jean Oursel. One side of the volvelle is a perpetual calendar; the other gives the phases of the moon and astrological info...

Johannes Hevelius' spinning moon in Selenographia, 1647

Johannes Hevelius' spinning moon in...

MIT Libraries. Movable Messages in Books: Spinning Wheels, Coded Disks, and Volvelles

Added 1 month ago | 00:00:15 | 305 views

Johannes Hevelius (1611-1687) published the first atlas of the moon, Selenographia, in 1647. The volvelle shown here could be used to determine the moon’s position relative to the stars that appeared around it. MIT’s copy is missing a st...

The MIT Sloan Initiative for Health Systems Innovation

The MIT Sloan Initiative for Health...

New York: MIT Health Systems Innovation Conference

Added 1 month ago | 00:14:49 | 435 views

Joe Doyle, Retsef Levi, and Janet Wilkinson, Directors of HSI

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