Robuta

https://makingscience.royalsociety.org/items/hs_1_291/letter-from-george-biddell-airy-to-sir-john-herschel-dated-at-royal-observatory-greenwich Letter, from George Biddell Airy to Sir John Herschel, dated at Royal Observatory, Greenwich | The... Autograph letter signed by sender. Further regarding the possible introduction of the metrical system for weights and measures. george biddell airysir john herschelroyal observatory greenwichletterdated https://makingscience.royalsociety.org/items/hs_1_32/letter-from-george-biddell-airy-to-sir-john-herschel-dated-at-dublin Letter, from George Biddell Airy to Sir John Herschel, dated at Dublin | The Royal Society: Science... Autograph letter signed by sender. Observations on the position of professorship at Dublin, conditions of service, income, etc. george biddell airysir john herschelthe royal societyletterdated