104 THE ROYAL SOCIETY 



arcanis Naturae exquirendis, Sodalitatem vestram praeclaram, fortunatis. 

 auspiciis conditam, tanta prudentia perfectam, celebrare velitis, Societati 

 Regali pro temporis opportunitate gratulamur. Nos qui sub auspiciis Lister 

 (hominis praeclarissimi et quondam Sodalitatis vestrae praesidis) abditas 

 causas, in quibus requiritur ex quibus principiis nostra corpora sint, quid 

 secundam quid adversam valetudinem faciat, patefacere laboramus, baud 

 immemores sumus illorum tarn praeclarorum virorum, Boyle, Mayow, Hales, 

 Jenner, Young quorum nomina cum multis aliis necnon illustribus in fastis 

 Societatis vestrae inscripta sunt. Tanto desiderio, tanta in vos benevolentia 

 vehementer commoti, virum bonum, doctissimum HENRICUM ROSCOE equitem, 

 per multos annos Concilio nostro praepositum, qui ipse praesens ad nostram 

 amicitiam praestandam feriis vestris intersit, legatum destinavimus. Floreat 

 in aeternum Societas Regalis penitus dilecta honoribus novis novisque inceptis 



exornata ! 



HENRY E. ROSCOE, Praeses. 



J. LUARD PATTISSON, Aerario Praefectus. 

 CHARLES J. MARTIN, Director. 



MATHEMATICAL SOCIETY, LONDON 



THE LONDON MATHEMATICAL SOCIETY, of whose duty it is part to elaborate 

 the instrument without which all pursuit of Natural Knowledge must finally 

 be futile, desires to offer humble congratulations on the attainment of her 

 two hundred and fiftieth Anniversary to the Royal Society. That this 

 Society may ever continue to be imbued with the reverent and enthusiastic 

 desire to unravel the secrets of Nature which has characterized all her most 

 distinguished Fellows, and may ever hold herself in readiness, untrammelled 

 by any too intimate relations with other institutions, to take her rightful 

 place in succeeding times of Renaissance, is the prayer of all the special 

 societies who own her pre-eminence. On behalf of the London Mathematical 

 Society * 



H. F. BAKER, President. 



July 16, 1912. 



MERCERS' COMPANY, LONDON 



To THE PRESIDENT, COUNCIL, AND FELLOWS OF THE ROYAL SOCIETY. THE 

 MERCERS' COMPANY OF LONDON desire to offer to you the President, Council, and 

 Fellows of the Royal Society their sincere congratulations on the occurrence 

 of the 250th Anniversary of the incorporation of your Society, whose history 

 from its commencement has been an uninterrupted and glorious succession 

 of conquests over Nature, conquests differing from other conquests in that they 



