These pans are sometimes heated by boiling oil, with the idea that under such conditions the sugar which is kept stirred all the time as it thickens cannot be burnt or caramelized; but the same object can be attained more economically with steam of a given pressure by utilizing its latent heat.
Liquid metal coming in contact with such a surface forms a crust of solidified metal over it, and this crust thickens up to a certain point, namely, until the heat from within the furnace just overbalances that lost by conduction through the solidified crust and the cathode material to the flowing water.
The flame rises up from the burner in a long thin column, but when an appropriate note is sounded it suddenly drops down and thickens.
The plot thickens while I digest this new information and sort out the players before I plan my future fun and games.
Yogurt is made by adding bacilli cultures to milk, so that it thickens, preserves, and becomes more digestible.
