9 8 



[Proc. B.N.F.C: 



the growth of partially and wholly included crystals at the expense 

 of the glass and Zeolites, thus producing the remarkable granitic 

 structure. The large Felspars with inclusions of Natrolite indicate 

 the transition from primary to "secondary" mineral-growth 

 from one magma in a beautiful manner. Such minerals as the 

 Zeolites may thus be regarded as "secondary" in the light of 

 secondary crystallizations in a new cycle of operations in which 

 the influence of water comes into play, but the whole process in 

 its various stages, from the uniformly molten magma to the hard, 

 dry Basalt containing Zeolites, is most probably one continuous 

 process of constructive crystallization. It is most likely that 

 further interesting evidence in support of this thesis will be 

 discovered in the near future by mineralogists sufficiently interested 

 to make a search, for similar structures, in the Zeolitic deposits 

 of the Tertiary Basalts in other localities. 



Mr. Strachan's paper was amply illustrated by a fine series of 

 hand specimens of beautiful Zeolitic minerals collected during the 

 past few years from quarries in the Basalt in the immediate neigh- 

 bourhood of Belfast, and by a number of microscopic sections. 



An animated discussion ensued regarding the theories 

 advanced, in which the Chairman, and Messrs. T. Dewhurst, 

 H. L. Orr, and William Gray took part. The speakers all 

 expressed their admiration of the work done by the two lecturers, 

 and the entirely original and very valuable nature of their 

 communications. 



"THE DISPERSAL OF SEEDS." 



The sixth and last meeting of the Winter Session, was held 

 in the Museum, College Square North, on Tuesday evening, 8th 

 April, when Mr. Arthur Deane, curator of the City Museum, 

 kindly favoured the Club with a popular lecture on the interesting 

 subject of " The Dispersal of Seeds." The President of the 

 Club, Mr. Robert Patterson, F.L.S., occupied the chair, and called 

 upon Mr. Deane to proceed. 



