I originally had a long post on the Zodiac, which I somehow managed to delete, so for Z I have Zygomancy. This is divination by weights.
Wikipedia lists it but doesn't have a corresponding article. According to occultopedia.com it involves suspended weights, or weight comparison, and was practiced by the Ancient Greeks, Romans, and Persians.
In general the practice seems to have been based on whether an object was easy or difficult to lift, or whether it was perceived to be light or heavy. Pendulum dowsing also falls into this category.
The best example of Zygomancy I can think of is the witch trial in Monty Python and the Holy Grail.