1. Lightning is caused by the friction of vapor, which is at a suitabletemperature. Thus two or more currents of air coming together willcause lightning, as the friction concentrates the electricity, and as there isno conductor the heavy voltage flies usually toward the nearest conductoThis voltage is so great that it explodes the air. The air coming togethergain produces a great vibration, called thunder2. Aurora Borealis. The outer circle around the earth representsatmosphere.
The sun current carries it far from the earth's surface. At thenorth, when the sun's reflection strikes the earths crust in such a mannerits reflection will be seen in the atmosphere at a great height, calledNorthern Lights. This is mostly seen in November, December, andJanuaFigure: Uncaptioned line drawing (accompanying the paragraphabove)of the Earth's orbit about the sun.3. The museum of Alexandria was established about 400 years B.C.for the purpose of restoring science that had been lost thousands of yearsbeforeThe cultivation of knowledge by experiment, observation, andmathematical discussions: this was the birth of a science of to-day. Thelibrary contained many thousands of volumes of books, but was destroyedby Cyril; a girl in charge of the library by the name of Hypatia wasbrutally killed and the flesh was scraped from her bones with sea shellsThis occurred in 414A DAlexander died at Babylon 323 B.C.China, Mesopotamia, and India had made astronomical observations atthis early date. Most of these leamings were destroyed. Brono, IsaacNewton, Brably, and some few others, promoted science by theirdiscoveries of what is to-day."Good Will to man