The discovery of cells

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Across
  1. 2. The last name of the Dutch scientist considered the "father of modern microscopy".
  2. 4. ______ the Great of Russia was so intrigued that he visited Leeuwenhoek to see the "animalcules".
  3. 6. The random, jiggling motion of tiny particles, named after the man who described it.
  4. 8. The material in which Hooke first saw and named "cells".
  5. 9. Leeuwenhoek kept up his microscopy work while holding a full-time job as a cloth _____.
  6. 10. The title of Hooke's famous 1665 book, filled with drawings of his microscopic discoveries.
  7. 12. The prestigious ______ Society of London, which eventually verified Leeuwenhoek's amazing findings.
Down
  1. 1. City that Robert Hooke helped redesign after its Great Fire in 1666.
  2. 3. Leeuwenhoek carefully kept his unique lens-making technique a ______.
  3. 5. Leeuwenhoek's term for the tiny "zoo" of microorganisms he observed.
  4. 6. Robert Brown's profession as a scientist who studies plants.
  5. 7. The dark, blobby structure that Robert Brown was the first to identify inside a cell.
  6. 11. The simple, four-letter name Hooke gave to the tiny compartments he observed.