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Get high-end Fulltouch blackboard chalk from Japan before it disappears forever

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The Blackwing of chalks, Fulltouch is beloved of mathematicians who despair now that the manufacturer, Hagoromo, is out of business.

Gizmodo's Sarah Zhang explains this legendary … chalk.

The first thing you notice is a shiny, clear coating on the outside — it feels like a thin layer of enamel. That sounds like a minor design element, but it cuts down on the biggest annoyance with chalk: dusty fingers.

Academics are breathless with awe at this incredible … chalk. Satyan Devadoss, a Williams College math professor, writes of the "Dream chalk."

There have been rumors about a dream chalk, a chalk so powerful that mathematics practically writes itself; a chalk so amazing that no incorrect proof can be written using this chalk. I can finally say, after months of pursuit, that such a chalk indeed exists.

I have just bought a $60 box of chalk.

I do not own a blackboard.

Hagoromo Fulltouch White Chalk 72pcs [Amazon referral link]

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Lithograph of the Salem Witch Trials

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Joseph E. Baker's "Witch No. 1" (1892) is a stunning lithograph illustrating the imagined events that are part of the mythology of the horrific Salem Witch Trials of the late 17th century. To learn more, check out Smithsonian's "Brief History of the Salem Witch Trials."