On the Rockwell Quarter Load Hardness Test (3rd Report)

NEW NIST PRACTICE GUIDE ON ROCKWELL HARDNESS TESTING AVAILABLE The NIST Recommended Practice Guide: Rockwell Hardness Measurement of Metallic Materials

WANTED: MEASUREMENTS WITH GOOD REFERENCES In nearly all types of activities-be they related to manufacturing, finance, health, regulatory affairs or even sports-people and organizations are becoming sticklers for measurement uncertainty. NIST, the nation’s measurement authority, has responded to this growing customer need for demonstrable uncertainty. It has created an on-line resource— www.nis...

Capability in Rockwell C Scale Hardness

A measurement system is capable if it produces measurements with uncertainties small enough for demonstration of compliance with product specifications. To establish the capability of a system for Rock-well C scale hardness, one must assess measurement uncertainty and, when hardness is only an indicator, quantify the relation between hardness and the product property of real interest. The uncer...

Mountain Monitor-3rd Quarter 2009

Mountain Monitor-3rd Quarter 2009

Health of Calcutta during the 3rd Quarter of 1878

From the health officer's report for this period, it appears that the aggregate mortality of the months of July, August and September was greatly in excess of the average of the preceding decade. " Fever" continues to contribute a high figure. Cholera was decidedly below the average, bowel complaints slightly so, smallpox in decided excess but declining ; the figures for the three months being ...