Open main menu

Page:Popular Science Monthly Volume 89.djvu/675

This page needs to be proofread.

Watching a Battle Through a Super- Periscope

���Secreted in their headquarters m the wine cellar of a demolished chateau, the officers are able to watch the battle raging outside with the aid of an immense periscope supported in its place by a wall of masonry. The roof of the cellar is covered with bomb-proof pads


�� �