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"Galleries of the west front of the Cathedral of Amiens, 13th century, illustrating treatment of galleries as a decorative feature." -Whitney, 1911

Galleries of Cathedral of Amiens

"Galleries of the west front of the Cathedral of Amiens, 13th century, illustrating treatment of galleries…

"It is apparent that the auditor, in this case, must be placed in the centre from which the sound proceeds, to receive the greatest effect. But if the shape of the room be elliptical, the sound may be made in one part, and the echo will be heard in another part, because the ellipse has two points, called foci, at one of which, the sound being produced, it will be concentrated at the other." -Comstock 1850

Whispering Gallery

"It is apparent that the auditor, in this case, must be placed in the centre from which the sound proceeds,…

"The females alone excavate the domiciles, which consist either of branching galleries, as in the gallery of Xyleborys pubescens, or of a broad but thin and leaf-shaped chamber at the end of one of several entrance ways."—Government Printing Office, 1897

Gallery of Xyleborus Pubescens

"The females alone excavate the domiciles, which consist either of branching galleries, as in the gallery…

The galleries of the Xyloterus retusus tend to be built rather deeply into the wood, with the branches extending mostly horizontal.

Gallery of Xyloterus Retusus

The galleries of the Xyloterus retusus tend to be built rather deeply into the wood, with the branches…