Troisdorf powder, 191, 192.

Turpin's melinite, 156.

U.S. naval powder, 180.

Uses of celluloid, 91, 93, 102.

Uses of collodion-cotton, 90.

Vaseline, 208.

Vielle poudre, 190.

Volney's powder, 148.

Von Foster's powder, 191.

Walsrode powder, 188.