The screw thread for small bolts is represented by thick and thin lines, such as was shown in Figure 152, but in larger sizes; the angles of the thread also are drawn in, as in Figure 202, and the method of doing ... Read more of Screw Threads And Spirals at How to Draw.ca
Info about the spell:
Aloura, is another God spell. This spell creates a White Smoky Energy wall around you for two seconds, enough to cast the oponents spell away. If you are a trained God Wizard or Witch, you could use the spell to repel it against the opponent or absorb it and extract a fully charged Bombarda Maxima Against the opponent.
How to cast the Spell: Think of a white energy wall halfway around you, and think of Maria, mom of Jesus coming Into your wand and put really many memories, good memories, into the wand, and then combine the memories and Maria, and shout Aloura out, and the white wall will appear.
This spell is really similar to the ordinary wizard spell: Defenca, but is much more defencive in quality, and more frightening against Evil.