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Letter from Charles Babbage to John Lubbock

He congratulates him on his commercial tables: 'I admire your tables and have made use of one the 3 per cent. - It is exceedingly desirable to have the Constants of Commerce and Manufactures and when I have printed my volume I will try to make the manufacturers who are most interested collect more of them'.

Letter from George Airy

Observatory - GA returns a parcel of amethystine crystals of which, due to their rough surfaces, he has been able to make nothing. 'I have lately determined an odd thing in the way of polarization, viz that the light of ladies eyes is polarized - at least when viewed in particular directions. When deprived of this light, the eye has a most unnatural appearance'.

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