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 there is a variation/ range of mean diurnal temperatures of 10.5 Â°C (18.9 Â°F). The weather in April is a little parched with rain, sleet or snow once in a while. A mere 48mm (1.9in) of H2O is transfered during on average 15 days. In April the blue above Krakow is a little dull with on average a modest 4:29 of intense sunlight per day. The shortest day is 12:50 long and the longest day is 14:37 long with an average length of 13:45.