.....Another thing I cannot figure out. In the text they refer to
schematics, and the valves are designated V_1, V_2, etc. (capital V and
a subscript, the subscript being a numeral corresponding to a numbered
valve). But sometimes they italicise the capital "V" and other times
not. This seems to vary section-by-section. Is there any reason that the
"V" would be italicised sometimes and not others? As I said, this is
ONLY when the text is referring to a schematic, not in any formulas
given.... ?

DougC wrote:
....Another thing I cannot figure out. In the text they refer to
schematics, and the valves are designated V_1, V_2, etc. (capital V and
a subscript, the subscript being a numeral corresponding to a numbered
valve). But sometimes they italicise the capital "V" and other times
not. This seems to vary section-by-section. Is there any reason that the
"V" would be italicised sometimes and not others? As I said, this is
ONLY when the text is referring to a schematic, not in any formulas
given.... ?

Yes, most definitely. It establishes that the text is the rare version
which was typeset by an Italian while having an arguement with his wife
at lunchtime. All other versions of this text known to have been
printed have been too destroyed by pesto drippings and red splotches
with traces of dried Chianti yeast to read. Suggest you contact a good
radio museum immediately for a fair appraisal.