12:0512:05, 15 August 2009diffhist+45
Plato scale
Cross ling to specific gravity article for apparent specific gravity. Add pycnometer as means of measurement
01:4101:41, 14 August 2009diffhist+2,854
Specific gravity
Further material on the importance of sample and reference temperature and of apparent vs. in vacuo SG. British SG scale mentioned. Additional references.
13 August 2009
15:5315:53, 13 August 2009diffhist+4,867
Specific gravity
Add (T/T) notation. Add (20/20) is more common than (20/4) today. Correct water density value. Add measurement; true and apparent SG. Add U-tube meter. Add references.
14:1014:10, 12 August 2009diffhist+4,992
Plato scale
Moved efficiency example to separate (Applications) section and added other applications. Minor edits, references added, cross links enhanced
14:2014:20, 27 July 2009diffhist+219
Standard Reference Method
Change to reflect that Ref. 7 computes deviation coefficients from transmission spectrum. Can be done with absorbance spectrum but color accuracy is better with trans.
13:2913:29, 24 July 2009diffhist+1,861
Standard Reference Method
Added definition of EBC color and reference to Beer Lambert re relationship between EBC and SRM. Corrected basis for choice of 430 nm. Added references. Added material on augmented SRM.