100 Proceedings of the British Association. 



Cork Meeting, at the joint recommendation of several Sections, 

 stating the desirableness of having contour lines of elevation en- 

 graved on the maps of the Ordnance Survey of Ireland, as had ac- 

 tually been done in the map of the county of Kilkenny, so as to 

 show all the varieties and direction of level in the country surveyed. 

 A memorial pointing out the advantage of such indications for 

 drainage, road- making, regulation of water-supply, mining opera- 

 tions, and several other important purposes, had been presented to 

 the Government, and though no distinct reply was given, informa- 

 tion had been received that the contour lines had been ordered to be 

 continued. The application for aid in the publication of Prof. Forbes's 

 Researches in the iEgean Sea, had been favourably received by Her 

 Majesty's Ministers ; the sum of 500/. had been granted for the 

 purpose ; 500 copies were to be printed, 50 of which were to be 

 placed at the disposal of Her Majesty's Government for presentation 

 to various foreign bodies, 50 to be given to Prof. Forbes, and the 

 remainder to be sold to the public at a considerable reduction on the 

 cost price. The Government had also advanced a thousand pounds 

 in aid of the publication of the catalogue of Stars in the Southern 

 Hemisphere. 



Section D— ZOOLOGY AND BOTANY. 



This Section met this morning at eleven o'clock, in the theatre of 

 the Yorkshire Museum. The attendance at this Section was more 

 than usually numerous. 



The Secretary commenced the proceedings by reading a paper 

 * on the periodical birds observed in the years 1843 and 1844, near 

 Llanrwst, Denbighshire North Wales,' by John Blackwall, Esq., 

 F.L.S. — This was a continuation of the author's former observations 

 on the same subject, which were commenced at the suggestion of 

 the British Association, in order that extensive tables of the period 

 of the arrival and disappearance of animals, and other periodic phe- 

 nomena in the organic kingdom, might be obtained. 



Mr. Arthur Strickland, of Burlington, observed that a single paper 

 could not afford matter for inference. The period of appearance and 

 disappearance of birds is very uncertain. 



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