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.
In April the range/ variation of daily mean temperatures is 15.4 Â°C (27.7 Â°F). The weather in April is somewhat parched with seldom any rain. A paltry 24.6mm (1in) of liquid falls during an average of 4 days. In April the blue above Fresno, California is glorious having an average of an appreciable 10:40 of radiant sunshine per day. The shortest day is 12:32 long and the longest day is 13:38 long with an average length of 13:06.