NOTE TO FACE PAGE 128 (NO. 3, YOL. IX.) 
Line 12 from bottom. Add after the words “very hot soft iron”:—This 
method was uncertain; shell so cast were apt to be insufficiently chilled, there¬ 
fore at present no soft iron is added. An iron box, lined with fire-clay, containing 
two small holes through which the metal flows, is placed over the mould. The 
metal is poured in till the shell is filled and rises a little in the “runner and riser”— 
which are made large; the box is then removed, and the “ runner and riser ” filled 
with very hot hard iron. The large mass of metal keeps sufficiently hot to allow 
the shell to “ feed.” 
