Observation by Bill Barton: More on BAA Instrument 169

Uploaded by

Bill Barton

Observer

Bill Barton

Observed

2020 Jan 09 - 07:56

Uploaded

2020 Jan 09 - 07:56

Objects

Historical

Title

More on BAA Instrument 169

About this image

Carriage movement registering counter on left (circle calibrated 0-10-20-30-40), single micrometer screw on extreme left.

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