0 a small plate, for example one that you put your bread on when you are eating the main part of a meal
A quarter plate can thus be cut up into strips to yield about a dozen comparative experiments.
There is really no difficulty in cutting strips a quarter of an inch wide, the lengthway of a quarter plate.
The red should just be seen along the left edge of the quarter plate.
The spectrum will be seen on the ground glass, probably equal in dimensions to that of a quarter plate.
