Dan Gelbart returns to YouTube after a 9-month hiatus, with this video on historical scientific instruments. 54:19 video:
Previously:
New Dan Gelbart video and Rapidia 3D metal printing - video
Metrology high accuracy with Dan Gelbart
Homemade high precision air bearing CNC lathe and grinder
Laser centering device for milling machines and drill presses - video
uniflow steam engine
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