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The Bonin Europeans

Had Louis de Freycinet, when he left Guam, chosen to go a little bit west of north, instead of a little bit east, and had he held that course a little bit longer before turning east, he could have visited the Bonin Islands,

Mogg in meltdown

It seems that Jacob Rees-Mogg thinks that the people who died in the Grenfell fire did so because they lacked common-sense, and that Andrew Bridgen, his apologist who has now himself apologised, thinks that Mogg would have survived because he is clever.

The magnetics of DC power

For magnetic surveys, power lines are a nuisance. Normal AC lines can interfere with magnetometer electronics if you get too close. But what about DC lines? Just forget about working anywhere near them.