Speaking of the symptoms of a young maniac, cured by electricity, he says, "When in the yard, he would look intently on the sun if permitted, until the albuginea became scarlet, and the tears flowed down the cheeks, unconscious of inconvenience."
"Chapters in the History of the Insane in the British Isles"
Daniel Hack Tuke
The two coverings of fibro-serous structure which surrounded the testis in the loins become respectively the tunica albuginea and tunica vaginalis when the gland occupies the scrotal cavity.
"Surgical Anatomy"
Joseph Maclise