Sift a small quantity of the dust on to a semiglazed white paper about 8 by 10 inches.

On the inside is fixed a Barometer, by which he can tell the depth he is under water; a Compass, by which he knows the course he steers. In the barometer and on the needles of the compass is fixed fox-fire, i.e. wood that gives light in the dark.

From their initial habitats, many anthropochorous insects have been transported by humans around the globe and several are now cosmopolitan in distribution.

IN Planes neither equinoctiall nor polar, the equator will be a right line, the tropiques and other parallels of declination will be conicall ſections, ſome of them parabolicall, ſome ellipticall, but the moſt of them hyperbolicall.