13
a good memory," thus, anything which is "Mnemonical," will be that which endows supplies, or assists the memory.
Mnemonical-translation, will therefore mean to translate, or change, one thing to another for the purpose of assisting the Memory.
Let us then simply define the fourth principle thus—Mnemonical translation, is to Make that which is not familiar more familiar."
Some would perhaps think the first and the fourth principles very much alike, but, although they may at first appear to be so, there is a difference between them. When using the first principle, you have to make an unfamiliar, familiar, by a "similar sound;" but, when using the fourth principle, you have to make an unfamiliar, familiar, whether it sounds like it or not. That may be done when you wish to deal with foreign alphabets. Geometrical forms, &c., by asking yourself what the character "looks like" and trying to create a resemblance between the one that you do know, and the one that you do not. But in some cases we make an unfamiliar more familiar, where there is not the slightest similarity between the two; either in "sound" or "structure"; we adopt this course when dealing with figures." (Algebraical characters) Let us take for example the figure "1" which we will call
