ter was sweeter and better than it would have been had Erie Canal: the prism to be 70 feet wide at water surface, ing the focus of any lens from three inches to seventy-two it been drawn from a closed well with a pump of any kind. Our engraving shows a water elevator embodying all that 521-£ feet… … case of a dealer, and will be found very useful since its buckets are perfectly balanced. The by any one dealing in spectacles as well as the shaft of the windlass is mounted on roller bear- NEW OPTOMETER. ings, reducing- the friction to a minimum. regular optician. This invention was recently…
Patents · Iron · Water · Fence · Patented · Feet · Barbed wire · Improved · Water Supply · Tobacco smoke · Half feet · Cast Iron · Scientific American · Wrought iron · Legal fence · Wire fence · Steam pump
Internet Archive · Public domain (published before 1931). Free to use for anything.
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