Note V — IV. MISCELLANEOUS EXAMINATIONS.
Jesse P. (Jesse Park) Battershall translation
Cotlini
(
Ann. du genie civil
, No. 3, 1873) states that the following reactions occur when artificially colored wines are heated with potassa:
Pure wine no precipitate greenish hue
Elderberry violet "
Beet-sugar red "
Logwood red violet-red "
Privet violet-blue "
Turmeric light-blue "
According to
M. de Cherville
(
Quar. Jour. Sc.
), a bright violet coloration is produced in the above test, if litmus be present.
Fuchsin is separated by treatment with subacetate of lead and addition of amylic alcohol (
Jour. de Ph. et de Ch. Mar. 1873
).—
Trans.