This means that balloons can carry more weight on a cold day, or if the air inside the balloon is made very hot.

The number of passengers a balloon can carry depends on its size.

The balloon carried equipment that was set to automatic.

A balloon carried Hood up to 460 meters above the ground where it was detonated.

The balloon would carry instruments for making wide-ranging observations just above the landscape.

High-altitude balloons can carry scientific instruments above 99.7 percent of the atmosphere.

The balloon carries a transmitter powerful enough to relay readings to a satellite.

These balloons carried recording instruments beyond even the highest clouds to a height of 17 kilometers.

"Well, the Japanese did have some plans in mind for balloons carrying biological agents-deadly diseases-over here near the end of the war."

Two hundred unmanned balloons carried small bombs although few bombs actually hit the city.