30 degradation, less than one-half degradation, less than one-half has been stripped of its cover has been stripped of its cover of arch-arching of overarching ● Typos fixed; non-standard spelling and dialect retained. ● Used numbers for footnotes. ● Enclosed italics font in _underscores_. ● The caret (^) serves as a superscript indicator, applicable to individual characters (like 2^d) and even entire phrases (like 1^{st}). ● Subscripts are shown using an underscore (_) with curly braces { }, as in H_{2}O.