LUMP SUGAR • DICTIONARY ONE.COM • Definition of Lump sugar

... none of the white underlying pith is taken, as that would make the punch bitter, whereas the yellow portion of the rinds is that in which the flavor resides and in which the cells are placed containing the essential oil. Put this yellow rind into a punch bowl, add to it two pounds of lump sugar; stir the sugar and peel together with a wooden spoon or spatula for nearly half an hour, thereby extracting a greater quantity of the essential oil. Now add boiling water, and stir until the sugar is completely dissolved. Squeeze and strain the juice from the ...

— Scientific American Supplement, No. 315, January 14, 1882 • Various