16. Did the Feudal System exist in England before the Norman Conquest?
17. Was it wise policy on the part of Germany to annex Alsace-Lorraine?
18. Is there sufficient reason for believing that plants and animals can live together in a state of symbiasis, i. e., a mutually beneficial parasitism?
19. Are the continents permanent or instable.
20. Do the facts now known by geologists bear out the supposition that any of the geological periods indicate worldwide changes in organic and inorganic conditions?
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Where references have been omitted they will be given in the printed schedule later.