Lights where the unwanted entrails & offal of cows, pigs etc., canned as I remember in a blue & white can, a little larger than todays A10 can. My mother would make all manner of evil things from them & to this day I cannot face liver or kidney. It drives me mad on a Sunday when I have to put a pair of processed chicken "things" in the oven as my 11 & 12 year olds will not eat anything that has not been processed & frozen! Ironically, last night we took the youngest to visit what will soon become his new school, in the biology/science lab there was sectioned heart from a cow (real not plastic)& I had the urge to take it home & cook it for them! Stand over them with a leather belt and force them to eat it. But I had already decided years before they where born that the circle of that sort of behavior was broken! Broken it is & broken it shall remain. Regards Skipy