UNIVERSITY OF CHICAGO Research Institute requires 30 gal. samples of city of Chicago water at least five yrs. and not more than 20 yrs. old. Phone Midway 3-0800, Ext. 2502, or write 5640 Ellis-av.

"We are very grateful," said Priscilla Moctezuma, his sister, who said he is safe, suffered minor injuries and is "surrounded ...

The water clock dates to at least 1500 BCE, the basic principle being a device that uses the reliable flow of water to represent the passing of time.

While these clocks were considered accurate in their day, they weren’t by modern standards. In particular, the viscosity of water affects the accuracy of the clock.

Bedol Water Clocks are quickly stealing the spotlight for their unique ability to run solely on H2O, helping to reduce our carbon footprint on the planet. Not only are these clocks environmentally ...

The mall was once the cornerstone of one of the city’s preeminent shopping, dining and entertainment districts. Now, the ...

The history of clocks is a remarkable tale of human ingenuity and the pursuit of precision. Explore how ancient civilizations began measuring time and how this led to the creation of the first true ...

A master of the grandfather clock reveals time's hidden history To a veteran horologist, "time is still a man-made invention." In his Pennsylvania workshop, he fixes its flaws.

Every spring, we ritualistically move our clocks forward in most of the United States. Here is why we do this and the origins of the practice.