This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
Insert A screwdriver or Ice pick in A fish as shown, and the scales can be removed much better and quicker than in any other way. The handle of the screwdriver affords an efficient grip so that the fish can be held firmly on the board and every scale can be removed.
Ill: Holding Fish for Scaling