Scientists demonstrate low-cost, high-quality lenses for super-resolution microscopy

Researchers have shown that consumer-grade 3D printers and low-cost materials can be used to produce multi-element optical ...
The New York Times

The Gold Mines of Missouri.; IMPORTANT DISCOVERY OF GOLD, PLATINA AND TIN.

TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...