long poles to oxydize the green faecula, whicr. will then precipitate as blue indigo. About the latter end of the year 1799, oi the beginning of 1800,1 owned a large dyeing establishment in the ...

People have been wearing blue jeans for centuries. Originally, the blue color came from a natural indigo dye. The dye was chosen for the way it interacted with cotton. When heated, most dyes ...

The docile, nonvenomous eastern indigo snake is known for its lustrous, blue-black body; the reddish-orange hue on its chin, throat and cheeks; and its large size, as long as 7 feet from nose to tail, ...