| 11. | There are 17, 280 simplex facets and 2160 orthoplex facets.
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| 12. | Crux Easton wind engine is a Titt Simplex geared wind engine.
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| 13. | The geared Simplex engines were turned into wind by a fantail.
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| 14. | The omnitruncated 5-simplex is the permutohedron of order 6.
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| 15. | The omnitruncated 6-simplex is the permutohedron of order 7.
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| 16. | Simplex was the only motorcycle manufacturer located in the American South.
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| 17. | The omnitruncated 7-simplex is the permutohedron of order 8.
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| 18. | Stronglight cranksets, Simplex derailleurs, and Mafac brakes were standard.
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| 19. | Simplex mills have one spindle, and duplex mills have two.
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| 20. | Erekson formed Simplex Aeroplanes to sell the Cloudster and Zing aircraft.
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