I30 [Proc. B.N.F.C., 



investigation of the greater depths practicable. The lecture, 

 which was attentively listened to, most of those present taking 

 notes, was illustrated by a few experiments and a large number 

 of excellent photographic slides, shown by Robert J. Welch, 

 pictorially representing the different points of the lecture. 

 Professor Cole explained to the audience that the lecture was 

 necessarily of an introductory character, but that the subsequent 

 lectures would deal more definitely with the different features of 

 the rocks of the earth. 



The practical work followed the lecture, and lasted about an 

 hour. It included the examination of rock -forming materials, 

 the crystallisation of artificial salts from solution, and the deter- 

 mination of the specific gravity of rocks, such as the basalt of 

 the Giant's Causeway, by means of Walker's Balance. 



2. A Volcanic Eruption — Lavas Old and New. 



3. The Roots of a Volcano — The Making of Granite. 



4. A River Mouth — Sand Banks and Mud Banks, River 

 Shells and Sea Shells. 



5. The Shore and the Sea — Wasting and Growing of Land, 

 Raised Sea Beaches. 



6. The Open Sea — Shell Banks and Corals, Chalk and Flint. 



7. The Building of Mountains — Schist and Gneiss. 



8. Lakes and Forests — Rock Salt, Alabaster, Iron Ore and 

 Coal. 



9. The Decay of Mountains — River Gravels, Plains and 

 Deserts. 



10. Glaciers and Icebergs — Moraines and Boulder-drift. 



On Saturday evening, 1 7th March, the final lecture of the 

 geological course arranged by the Club and delivered by Pro- 

 fessor Cole was given in the Museum, in presence of a large 

 audience. In the afternoon an excursion had been held to the 

 quarries at the Cave Hill, when a party of about seventy 

 examined the points of interest then exposed, Professor Cole 



