To mark the short quantity of syllables.

44. What is a short syllable?

One in which the vowel has the short sound.

45. What kind of a mark is the Tilde?

A Spanish mark.

46. How many uses has the Tilde?

Two.

47. What are they?

Placed over n it gives the sound of ny as, in cañon. In English it indicates certain sounds of the vowels.

48. How many accent marks are there?