Special Correspondence THE NEW YORK TIMES. TimesMachine is an exclusive benefit for home delivery and digital subscribers. Full text is unavailable for this digitized archive article. Subscribers ...

Some of our most beautiful rivers are ‘chalk streams’. Their pure, clear, constant water from underground chalk aquifers and springs, flowing across flinty gravel beds, make them perfect sources of ...

When prep school teacher Shin Hyeong-Seok came to Japan some 15 years ago and discovered the holy grail of chalk, he fell so deeply in love that he became an importer. Now, he manufactures the top ...

read one. “Long chalk to freedom,” read another. Nearby, a string of pink letters spelled out a warning: “Caution: Chalk is dangerous.” Other messages struck a different tone, welcoming ...

Still, a couple of extra bits might be handy to have around, including a small flathead screwdriver for prying and holding ...