William Murray Bell, Wm. M. Bell's "pilot"; an authoritative book on the manufacture of candies and ice creams (1911)
“ There are many varieties of cream slabs, concrete, stone, marble, sheet iron, steel and probably others any of which are good if a man gets used to them. Sometimes a good man will spoil half a dozen batches getting accustomed to a new slab. If your slab is perfectly smooth your cream needs less doctoring and can be creamed warmer than in the case of a rough slab, as the roughness of the slab will hasten the grain in the sugar. You should be extremely careful as to the cleanliness of your slab before pouring a batch of cream on it as well as to see that it is always well sprinkled. ”
