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.
The seasonal minimum is 4Â°C. Thus, the mean temperature average on this month of april in Toronto (Ontario) is 8Â°C. These temperatures are far removed from those records observed in Toronto (Ontario) in the month of april with a maximum record of 22Â°C in 2014 and a minimum record of -3Â°C in 2009. Day length in Toronto (Ontario) in april is 13:26.