Fig C

are: tree and branch; whale and blubber; Bengal and India; sea and waves; book and page; box and lid; cow and horns; bird and wings; ten and five; river and water. We may symbolize the relationship thus—

B. This occurs when two ideas or objects are different parts of the same whole. Examples are: hull and sails (of a ship); thumb and finger (of a hand), root and branch (of a tree); nerves and muscles; stairs and door. We may symbolize the relationship thus—

3. Quality

A. This occurs when two objects or ideas are related as object to quality, or substantive to adjective. Examples are: lead and heaviness; snow and whiteness; fire and heat; ball and round; bottle and glass; coin and gold;

bag and leather. We may symbolize the relationship thus—

B. This occurs when objects having the same prominent quality are linked together by some striking feature possessed by both, the feature not being their class, but a quality of each of them. Examples are: moon and orange (both round); paper and snow (both white); ink and negro (both black); feathers and cotton (both light); church spire and factory chimney (both high). We may symbolize the relationship thus—

This completes our seven logical connexions, which, with Contiguity or Proximity subdivided into Co-existence and Succession, make a total of nine. In practice, however, it will nearly always be sufficient to classify a connexion as belonging to one or other of the four Roads of Thought: Class, Part, Quality, or Proximity.

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