[pbs] Some frits are waking up Communicating about soil and grit size
Adam Fikso
adam14113 at ameritech.net
Tue Mar 3 14:54:47 EST 2009
Hello Nhu --There is a problem here related to the standardization of grit
size of stone in soils. There are many such sets of standards for different
sizes of grit, depending on usage. e.g., for lapidary work --grits are
noted in terms of mesh size per inch for abrasives up to 50,000 + per square
inch. For woodwork, etc. , there is more than one kind of grit size standard
for sandpaper, wet and dry,and for stone sizes in rock and quarry
materials for landscaping--and most of these scales are available and
downloadable from the internet.
Albert's idea of a photo would definitely solve some of these problems if
there was always a scale in the photo however crude, such as a quarter or
shilling, a cigarette, a finger or a ruler marked off in centimeters or
inches. Using the plant as a scaling device doesn't work if the plant isn't
known to most people, or is outside the usual range of sizes
Putting a sample of the grit(s) in a teaspoon might be widely enough known
to work quite well. What's universally recognizable and available to be
workable?
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