y without limit. This tool is. the invention of Mr. Edgar Smith. Itis sociation, recently held at Louisville, Mr. 8. B. Russell obtaining fine measurements on the planer or surface made by Chandler & Farquhar, 177 Washington Street, read ashort paper on standard water pipes. At present plate. In… … magnets, and of other conditions, were studied by is hollow—weighing less than 1 grain, or exactly MICROMETER SURFACE GAUGE. means of the altered mode of vibration of the tele- _0°0248 gramme, were detached for examination. The phone plate. The speaker had further obtained a workmen this tool is…
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