Note 8 — [From Bentley's Miscellany.] THE HISTORY AND MYSTERY OF THE GLASS-HOUSE.

The most plausible reason assigned is that of the expansion of the tube toward the fire by the influence of the heat. The fallacy of this theory is at once shown by the fact that, although heat does expand bodies, it does not increase their weight; therefore, notwithstanding that one side of the tube may be expanded, its equilibrium will remain unimpaired.