Some Tables for the Interconversion of Metric and English Units
Persifor Frazer · Biodiversity Heritage Library (Smithsonian Institution) · 1878
Millimeter.Mean of eight Distance apart...... Pispete wcie eib.e 1.011 observations.Mean of eight Distance 'spartecadeet. sa 1.5561 measurements.It would be well if a material could be discovered soft enough to offer the minimum resistance to the excavating action of the stylus, yet which could be hardened without distorting the shape of the depression.Some Tables for the Interconversion of Metric and English Units.By PERsIFOR FRAZER, JR., A. M.(Read before the American Philosophical Society,