Dip circle

Dip circles (also dip needles) are used to measure the angle between the horizon and the Earth's magnetic field (the dip angle). They were used in surveying, mining and prospecting as well as for the demonstration and study of magnetism.

Georg Hartmann first discovered dip angle in 1544, when he noticed the needle on a compass dipped towards the north hemisphere. Rather than explore this phenomenon, Hartmann sought ways to eliminate it. However, Robert Norman around 1576 investigated dip angle further and in 1581 described in print a device to measure this phenomenon.

单词	Dip circles
释义	Dip circles 英语百科 Dip circle Dip circles (also dip needles) are used to measure the angle between the horizon and the Earth's magnetic field (the dip angle). They were used in surveying, mining and prospecting as well as for the demonstration and study of magnetism. Georg Hartmann first discovered dip angle in 1544, when he noticed the needle on a compass dipped towards the north hemisphere. Rather than explore this phenomenon, Hartmann sought ways to eliminate it. However, Robert Norman around 1576 investigated dip angle further and in 1581 described in print a device to measure this phenomenon.
随便看	northern rorqual的意思 Northern的意思 Northern Samar, Prov.of的意思 Northern Sami的意思 Northerns cotton的意思 Northern screamer的意思 northern screamers的意思 northern scup的意思 northern scups的意思 Northern sea robin的意思 northern sea robins的意思 Northern Sea Route的意思 Northern sennet的意思 Northern Shoshone的意思 Northern shoveler的意思 northern shovelers的意思 Northern Shrike的意思 northern shrikes的意思 Northern Shrimp的意思 northern shrimps的意思 Northern Silky Oak的意思 Northern snakehead的意思 northern snakeheads的意思 Northern snow bedstraw的意思 northern snow bedstraws的意思