The chemist examined several tar waters to determine which had the highest concentration of phenols.

The apothecary carefully measured a dose of tar water and explained its old use for easing coughs.

Researchers studied the environmental impact of gas tars discharged from century-old industrial sites.

Police reports warned that an increase in overdoses was linked to black tar found in several neighborhoods.

The seasoned Jack Tar regaled us with salty sea stories during the harbor festival.

When sealing the roof, she always reached for a tar-brush to spread the waterproofing compound evenly.

The old jack-tar recounted his adventures at sea with a wry smile.

We covered the shed roof with tar paper before laying the shingles.

After handling pitch all day, she developed a painful tar-boil on her forearm that needed medical attention.

The paleontologists studied bones recovered from the tar pit near the old highway.