Geological Society. 229 



give us in one paper, however long, an exposition of Mr. 

 Heaviside's views on this subject, he would confer great 

 benefits upon the average electrician. Mr. Heaviside can 

 discover new truths, and we all believe in his results when 

 we understand them, but he seems unable to lower his reason- 

 ing to our mathematical levels. Since writing this paper I 

 have tried to understand Mr. Heaviside's numerous papers on 

 this subject, but I am sorry to say that I am not yet able to 

 express a certain opinion as to the practical value, or want of 

 value, of the preceding tables. 



XXI. Proceedings of Learned Societies. 



GEOLOGICAL SOCIETY. 

 [Continued from p. 150.] 



June 7th, 1893.— W. H. Hudleston, Esq., M.A., F.R.S., 



President, in the Chair. 



rpiIE following communications were read : — 



-*■ 1. "The Bajocian of the Sherborne District : its Relations to 



Subjacent and Superjacent Deposits." By S. S. Buckman, Esq., 



E.GLS. 



This paper is partly the result of excavations made by Mr. Hudle- 

 ston, E.R.S., and the author at Sherborne, to determine the position 

 of the so-called ' Sowerbyi-zonQ.' 



The author uses the term ' Bajocian' in a merely conventional 

 sense to denote the lower beds of what has been called ' Upper part 

 of the Inferior Oolite.' He introduces a term emar (^«p) as a 

 chronological subdivision of an ' age,' and considers the beds dealt 

 with in the paper to have been deposited during 12 emata, which 

 he calls, in descending order, fuscum, zigzag, Truellii, Garanti- 

 anum, nioriense, Humphriesianum, Sauzei, Witchellia sp., discites, 

 concavum, bradfordense, and Murchisonce. 



A line from Stoford, Somerset, through North Dorset to Milborne 

 "Wick, Somerset, is the base-line of the district reviewed. Seventeen 

 sections of places close to this line are given to show the relations 

 of the beds, with the different amounts of strata deposited during 

 successive emata, and during the same emar at different places. 

 By means of Tables he shows that the area of maximum accumu- 

 lation receded eastwards in the earlier emata, and then proceeded 

 westwards during the later emata. A similar and corresponding 

 faunal recession and progression is pointed out, though the faunal 

 headquarters always remain west of the great accumulation 

 of deposit. Adding the various maximum deposits together, the 

 author finds as much as 130 feet of strata deposited during the 

 twelve emata, = (practically) the ' Inferior Oolite of Dorset.' This 

 is a far greater thickness than has hitherto been allowed to beds of 



