1.   A temporary stone shop set up with observation windows so the public can watch Pauli teach apprentices how to cut and carve stone will be set up by fall.

2.   Hippos in a pond can be watched from an underwater observation window.

3.   Of special interest is a veterinary observation window that allows visitors to watch medical treatment being given to wild animals a few feet away.

4.   Rod in hand, I walked to an observation window for an underwater glimpse of the passageway in action.

5.   Ross winces as he plops into a chair, and the two men glance at the Kickbox Xtreme class through the observation window.

6.   Police holding cells as a rule have either an observation window or a ceiling camera so the suspect can be constantly monitored.

7.   And although it was much warmer inside, ice was forming the wrong side of the observation windows of the Cable and Wireless balloon.