of S till it presses tightly against its use the necessity for high smokestacks is avoided. sizes of nails, and so arranged that only one compart- P and thus clamps the spindle S tightiy in place. The Mrs. Anna E. Cook and Mr. Frederick J. Cook, of Law- ment will be uncovered at any one time, thus… … resistance of any layer of carbon that may happen to form on the porcelain REVOLVING CHIMNEY CAP. HORSESHOER’S BOX. will be greater than that of the spark gap in the compressed gas. Conse- stack. The head piece comprises a peripheral plate and mixing of nails on the fioor, should the box be tipped…
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