ScientificAmerican1882-02-25.jpg Popular Mechanics 1922-03ThumbnailsScientific American 1891-12-05Popular Mechanics 1922-03ThumbnailsScientific American 1891-12-05Popular Mechanics 1922-03ThumbnailsScientific American 1891-12-05Popular Mechanics 1922-03ThumbnailsScientific American 1891-12-05Popular Mechanics 1922-03ThumbnailsScientific American 1891-12-05
Frager's water meter. Vertical section. Horizontal section through the axis of the pistons.



Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner