Fred Scoles posted August 3: >>"...The gram which is taught in measurement labs is usually the "apparent gram", meaning that it is approximate to a true gram but has corrections for the gravitational force and barometric pressure (air bouancy) for the particular altitude of measurement. Unfortunately, it is difficult to measure a true gram of mass unless one is in a good vacuum and has corrected for gravity...Because of this bouancy (air) and gravity thing, all ASTM 1 and Certified Weight sets (the expensive stainless steel sets) are corrected or altered by the mfgr. to comply to a certain geographic area. For example, a set of gram wts. made in Switzerland isn't so accurate for use in NY State...<< And Bob Hohf posted July 27: >>...science presents a very skewed view of the universe; there are many things (perhaps including piano actions) which simply have too many variables to isolate and measure them. Thus, the scientific method is more useful for some things than for others. Attempts to employ the scientific method improperly result in descriptions of >special cases< with little or no general application. It may be that every piano ever made is its own special case. Solving action problems to the extent of producing consistent and predictable results may require seeing through the mounds of data to a deeper level of understanding.<< Fascinating!!! The "in's and out's" of trying to put things in a "bag" only to find out it doesn't have a bottom. Infinity constantly expressing itself as individual being and circumstances. Appearing on the surface somewhat the same, yet subtlety ever so different. Thank you. Keith A. McGavern, RPT Oklahoma Chapter
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