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ROYAL INSTITUTION OF GREAT BRITAIN, LONDON 



THE MEMBERS OF THE ROYAL INSTITUTION OF GREAT BRITAIN congratulate 

 the Royal Society of London on the occasion of the celebration of its two 

 hundred and fiftieth Anniversary, and wish the Society all prosperity and 



success in the future. 



DONALD W. C. HOOD, 



Delegate of the Royal Institution of Great Britain. 



21 Albemarle Street, London, W. 

 July 16th, 1912. 



ROYAL METEOROLOGICAL SOCIETY, LONDON 



To THE ROYAL SOCIETY, LONDON. WE, THE PRESIDENT AND COUNCIL OF THE 

 ROYAL METEOROLOGICAL SOCIETY, desire to offer to the Royal Society our sincere 

 congratulations on the occasion of the two hundred and fiftieth Anniversary of 

 its foundation. We are deeply sensible of the pre-eminent position which the 

 Royal Society has always held in the promotion of natural knowledge, and of 

 the beneficial influence it has exerted upon the advancement of learning and 

 also upon the scientific development of the technical and industrial arts, by its 

 unceasing efforts. We recognize with especial satisfaction the support which 

 the Royal Society has afforded to the science of Meteorology, as exemplified 

 particularly in the labours of the Meteorological Committee. Many names 

 eminent in meteorological science occur in the Roll of Fellowship of the 

 Royal Society, and the published records of the Society contain numerous 

 contributions of outstanding importance to our knowledge of the mechanics 

 and physics of the atmosphere. In congratulating the Royal Society upon 

 a long and brilliant record of past achievement we are assured that it will 

 continue in the future to take an equally important part in the progress of 

 all branches of science. 



Given under the Seal of the Society, June 19th, 1912. 



H. N. DICKSON, President. 



FRANCIS CAMPBELL-BAYARD) 



W. F. CABORNE ^Secretaries. 



THE COUNCIL AND FELLOWS OF THE ROYAL MICROSCOPICAL SOCIETY have 

 commissioned HENRY GEORGE PLIMMER, a Fellow of the Royal Society, and 

 their own President, to act as their Delegate at the 250th Anniversary of the 

 foundation of the Royal Society. They have desired him to convey the 



