[ 16 ] Maulburg, near Schopfheim, in Baden, where Lola had visited relations of mine.
[ 17 ] Mittel = unbestimmt (uncertain; from Mitte = middle.)
[ 18 ] Fractions will be touched on in a later chapter on "Advanced Arithmetic."
[ 19 ] Chapter XVIII, "Spontaneous Answers."
[ 20 ] The poet, Hans Müller, has touched most eloquently on the power to think latent in animals in his book, "Die Kunst sich zu freuen."