ny delay ferent in its construction from any before illustrated. A paper on lighting conductors was lately read be- This skate is designed for those persons who have formerly incurred by threading. fore the Academy of Sciences in Paris by Mr. Callaud, This useful invention was patented Jan. 22,… … that it is a very useful ly intelligible, retain the DUTTON'S SHELL-GROOVE SKATE. thing. The iron radiator whole in position. Fig. 1 at the top is a good feature, as it equalizes the made in France of thin brass wires twisted together. represents a view of the skate attached to the foot,…
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