493 



arrangenieuts can be carried into effect, a most valuable body of 

 information, furnishing materials for the solution of some very 

 important meteorological problems still undecided, may, in a few 

 years, be collected in this country, at a trifling expense. 



The Council had, therefore, no hesitation in recommending this 

 proposal to your adoption, and having obtained your sanction, they 

 have taken steps to bring the subject under the notice of those indi- 

 viduals and public bodies whose co-operation is necessary to the 

 success of the undertaking. 



A communication from the Rev. Dr. Kobinson, as President of 

 the British Association for the Advancement of Science, has also 

 directed the attention of your Council to a subject of great im- 

 portance, namely, the reduction of the heights in the maps pub- 

 lished by the Ordnance Survey of Ireland, to the level of the mean 

 tide. The subject was referred to the Committee of Science, and 

 upon the recommendations made in their Report, your Council have 

 agreed to the following resolutions : 



" That the levels of the beach marks, erected during the pro- 

 gress of the levelling operations undertaken in connexion with 

 the tidal observations round the coast of Ireland, be published in 

 detail. 



" That the levels of the new edition in the Ordnance Maps of 

 Ireland be referred to the mean tide, in case the work be not 

 already too far advanced, to render such an alteration inexpedient. 



" That the height of the mean tide, above the Ordnance zero 

 plane, be engrossed on each sheet of the old edition." 



The Council have also taken steps for the publication of a Ca- 

 talogue of your Museum, and have requested Dr. Pctrie to under- 

 take this task, under the superintendence of the Committee of Pub- 

 lication. They propose to print, in the first instance, such a 

 Catalogue of the Museum as will assist the public or the stu- 

 dent in the intelligent examination of its contents; with such 

 descriptions only as are necessary for identifying the several arti- 

 cles, referring them to some judicious classification, putting on 

 record their history, and ascertaining their probable dates. It is 

 hoped that this may be done within the limits of an octavo volume, 

 of about 300 or 350 pages ; and it is proposed to illustrate and 



