Lunar Eclipse

June 15th, 2011 § Comments Off on Lunar Eclipse § permalink

I came up to the roof to hang up some wet laundry to dry, and stayed to watch the lunar eclipse.

I watched the bright shiny white moon shrink into a crescent, like a waning moon on fast-forward, until it was a glowing red ball.  The movement them became less noticeable as the moon passed through the penumbra shadow, where the change was a slow darkening of the glowing red orb. » Read the rest of this entry «

Mechanical Computers solve Mechanical Problems

June 7th, 2011 § 1 comment § permalink

I’ve long forgotten how I stumbled upon this series of videos on YouTube, but I find them absolutely fascinating.  They appear to be from a 1953 US Navy training film about the fire control computer on a naval ship.   There isn’t a single electrical anything, purely gears and such.  » Read the rest of this entry «

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