The Revolutionary Tribunals constituted the principal means of action of the Terror.

Cerebral hypothermia is the principal means of providing neurologic protection during cardiac surgery.

The principal means of transport is old, underpowered buses and horse and trap.

Ornament is one of the principal means of enhancing the value of the raw material.

The principal means of making mechanical memorization less prominent.

The East Indian railway and the Grand Trunk road afford the principal means of land communication.

Under the old dispensation of Indian supremacy it supplied the natives their principal means of support.

The exclusive privileges of corporations are the principal means it makes use of for this purpose.

It was this Bible rather than the a-b-c book that became the principal means of instruction.

These small vessels afforded the principal means of transportation through the uncharted wilderness tidewaters of Virginia.

These are the principal means of preserving the state, but perpetual care will also be required.

Our principal means of communication is the telephone.

At any chosen moment the demons could have deprived them of their principal means of existence!

The fourth is that the principal means proposed for obviating it would be inexpedient in the extreme.

But apart from this, the principal means of communication are the navigable streams and the waggon roads.

Some of these tribes were named the Hare Indians-hares and fish being their principal means of support.