The magnetic compass is an old Chinese invention, probably first made in China during the Qin dynasty (221-206 B.C.). Chinese fortune tellers used lodestones (a mineral composed of an iron oxide which aligns itself in a north-south direction) to construct their fortune telling boards.
Guide to Pennsylvania weather in April. The average maximum daytime temperature in Pennsylvania in April is a comfortable 17Â°C (63Â°F). The average night-time temperature is usually a cold 5Â°C (41Â°F). There are usually 7 hours of bright sunshine each day, which represents 55% of the 13 hours of daylight. Expect 95mm (3.7 inches) of rainfall across the whole of April with 11 days with some rain falling.
Allentown's warmest month (on average) is July with a daily average temperature of 73.4 Â°F (23.0 Â°C) and the coldest month (on average) being January with a daily average of 27.8 Â°F (â2.3 Â°C).The average precipitation of Allentown is 45.35 inches (1,152 mm) per year.Allentown occasionally has some severe weather, mostly thunderstorms and flooding. Winters can bring snow, with some years receiving very little of it while others seeing several major snowstorms (often Nor'easters).March 2013). The climate of Allentown, Pennsylvania is classified as being in the transition between a humid continental and humid subtropical climate (Koeppen KÃ¶ppen/Dfa, cfa), respectively although lying closer to the. former