Читать книгу Endless Amusement - Unknown - Страница 29
Invisible Red Ink.
ОглавлениеTo the pure spirit of vitriol or nitre, add eight times as much water.
Use the above solution of violets to make visible the characters written with this ink.
To the pure spirit of vitriol or nitre, add eight times as much water.
Use the above solution of violets to make visible the characters written with this ink.
