1.   The two bulbs contain different gases.

2.   A few dry holes were hit last summer, and several tracts in the Azerbaijani sector turned out to contain gas instead of oil.

3.   Hovering like giant street lights at the intersection of those disciplines are galaxy clusters containing gas so hot that it copiously emits X-rays visible to Chandra.

4.   Hovering like giant streetlights at the intersection of those disciplines are galaxy clusters containing gas so hot that it copiously emits X-rays visible to Chandra.

5.   Several contain enough gas that if they exploded, would contaminate a huge area of eastern Washington.

6.   The agent consists of millions of microscopic bubbles, which contain gas to help maintain their structure.

7.   City Hall spokeswoman Henny Strooy said the smoke might have contained chlorine gas.

8.   Cylinders containing tritium gas were being packaged when the valve fitting on one cylinder apparently failed and triggered monitors inside the facility.

9.   Quoting unnamed sources connected to the police investigation, Kyodo said the type of equipment bought is typically used for checking tanks containing toxic gas.

10.   Railroad spokesman Jack Burke said he believed one train car contained chloride gas.