Geological Soatiy. 541 



Kemarks. 



Dec. 18, 1873. For a second series of 15 on this day no first effect was found. 



Jan. 15, 1874. There was a sudden change of the current during the experiments, to 

 which the unusually small effect is most likely due. 



Jan. 16. There was a sudden change of the current during the experiments, to which 

 the unusually large effect is most likely due. 



Jan. 17. There was an irregularity at the beginning of the experiment. 



Jan. 20. Action somewhat irregular. 



Jan. 22. There seemed to be a first effect of the current on itself in the opposite 

 direction, 0—14—9. 



Jan. 26. There seemed to be again a first effect in opposite direction, - 47 — 57. 



Jan. 27. Ditto Ditto 0-17-17. 



Jan. 28. The action was very irregular. 



Jan. 29. It is suspected that during the experiments from Jan. 29 to Feb. 12 the con- 

 tact at the key was not very good. 



Feb. 3. The action was very irregular. 



Feb. 4. There seemed to be two first effects of the current upon itself in the direction 

 of increased resistance. 



Feb. 5. The action was very irregular. 



Feb. 6. There seemed to be a first effect of decreased resistance of current upon itself. 



Feb. 11. The wires had been broken since Feb. 6th. 



Feb. 12. One of the wires had got between the pole and the core of the magnet. 



Feb. 24. After the first on (2) the magnet was always put on (1). 



GEOLOGICAL SOCIETY. 



[Continued from p. 313.] 



January 21, 1874.— Prof. P. Martin Duncan, F.R.S , Vice- 

 President, in the Chair. 



The following communications were read : — 



1. Extract of a Despatch from Mr. Williams, H.M.'s Consul at 

 Samoa, dated Sydney, Oct. 28, 1873. Communicated by H.M.'s 

 Secretary of State for Foreign Affairs. 



" The afternoon before I left [Samoa], samples of gold in quartz 

 were put into my hands, found by three Englishmen in a valley 

 about three miles from the port of Apia ; but not having visited 

 the spot I cannot vouch for the discovery, but I have every reason 

 to believe that the gold is there. I have had the samples assayed 

 here, and the yield is at the rate of 3000 ozs. to the ton." 



2. " The Secondary Eocks of Scotland. — Second Paper. On the 

 Ancient Volcanoes of the Highlands and their Relations to the 

 Mesozoic Strata." By J. W. Judd, Esq., F.G.S. 



Introduction. — The vestiges of the Secondary strata on the west 

 coast of Scotland have been preserved, like the interesting relics of 

 Pompeii, by being buried under the products of volcanic eruptions. 

 The deposition of the Mesozoic strata in this district was both preceded 

 and followed by exhibitions of volcanic phenomena on the grandest 



