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.
Harrisburg, Pennsylvania Climate & Temperature. 1  Harrisburg, Pennsylvania, Usa is at 40 12'N, 76 50'W, 103 m (338 ft). 2  See map.3  Harrisburg, Pennsylvania has a humid subtropical climate that is mild with no dry season, constantly moist (year-round rainfall). During summer average high temperatures are 28.7Â°C (83.6Â°F) and average low temperatures are 17.5Â°C (63.5Â°F). 2  Come autumn/ fall temperatures decrease achieving average highs of 18.1Â°C (64.5Â°F) during the day and lows of 7.6Â°C (45.7Â°F) generally shortly after sunrise.