It is an excellent device for focusing your thoughts.

"It's an excellent device, you really must try it one of these days," she said, gesturing at the rifle.

What an excellent device," said he, "the use of a sheepskin for carriages.

Causal path models are excellent devices for forcing the data analyst to look at the appropriate marginal relationships in tables.

It dawned on him that if packaged together they would make an excellent promotional device.

Feigning an outbreak of pneumonia has proved an excellent device.

It is an excellent device to talk about what you have recently read.

"An excellent device, seeking to shock me into speaking; yet I do know 'twas but a fortunate conjecture."

It was an excellent device, and most efficacious in disseminating the Vampire belief.

The puzzle was fascinating, an excellent device for whiling away the tense time.