842 Intelligence and Miscellaneous Articles. 



The rock of garantiance hemera varies much from place to place 

 in thickness and lithic structure. Near the Mendip Hills it is 

 a conglomerate-bed ; in the country around Batcombe, ragstone, 

 very similar to the Upper Trigcmia-GcYit of the Cottes wolds ; 

 at Strutter's Hill, in part an Astarte-obliqua Bed — precisely 

 similar to that at Halfway House and Burton Bradstock ; at 

 Hadspen, mainly a massively-bedded brown building- stone (locally 

 called ' Hadspen Stone '), full of fossils. Similar rock is seen at 

 Shotwell and Woolston ; but south of Blackford the Garantiana 

 Beds coalesce, as it were, with the superincumbent repre- 

 sentative of the Doulting Stone, etc., and, while the lower part 

 eventually passes into the Sherborne Building-Stone, the upper 

 portion (together with the equivalents of higher beds) becomes 

 rubbly. associated with clayey matter, and passes into the Bubbly 

 Limestone Beds of the Sherborne District. 



Above the Garantiana Beds come, near the Mendips, the 

 massive Doulting Stone, Anabacia Limestones, and Rubbly Beds. 

 The Anabacia Limestones soon lose their distinctive lithic cha- 

 racters ; but the Doulting Stone spreads over the whole of the 

 Oolitic tract between Doulting, Bruton, and Cole, and is exposed 

 in numerous quarries. 



South of Blackford, as already remarked, the equivalent of the 

 Hadspen Stone {garantiance) is not easy to separate from the 

 equivalent of the Doulting Stone, etc. In the southern portion of 

 the district, the lower portion of the equivalent of the Hadspen 

 Stone passes into the Sherborne Building- Stone, and the top 

 portion, plus higher beds, into the Rubbly Limestone Beds such 

 as those that are so well displayed in numerous quarries in the 

 eastern portion of the Sherborne District. 



Samples of the soft layers and of the marly matter from the 

 interstices of the more rubbly beds have been examined by 

 Mr. Charles Upton for micro-organisms ; but they have proved 

 singularly deficient in such organisms. 



2. < Some Inferior-Oolite Pectens.' By E. Talbot Paris, B.Sc, 

 F.C.S., and Linsdall Richardson. F.R.S.E., F.GLS. 



XCTII. Intelligence and Miscellaneous Ai'ticles. 



To the Editors of the Philosophical Magazine, 



Gentlemen, — 



f WOULD point out that the method of comparing Self-Induct - 

 -*- ance and Capacity described by Mr. J. P. Dalton in your issue 

 of July 1914 is identical with that of Iliovici in Comptes Hoidus, 

 pp. 1111-1413, June 6, 1904 (Science Abstracts, A. 2282, 1904). 



I am, Grentlemen, 

 Lalbagh, Park Road, Yours truly, 



Teddington, Middlesex. Albeet Campbell, 



Nov. 8, 1914. 



