360 SECTIONAL TRANSACTIONS. — D, E. 



Afternoon. 



15, i'lof. 0. A. KoFoiD. — Hookworm and Hitman Efficiency. 



16, Prof. E. W. Hegner. — The Relations between Nucleus, 



Cytoplasm, and External Heritable Characters in the 

 genus Arcella. 



17, Prof. E. B. PouLTON, F.E.S. — 4 Preliminary Account of 



the Hereditary Transmission of a minute, extremely 

 variable, generally asymmetrical marking in the fore- 

 wing of the Curra7it Moth (Abraxas grossulariata). 



Saturday, August 28. 



Excursion to SoutHerndown and Merthyr Mawr. 



Exhibits. 

 There were on exhibition throughout the meeting: — 



(a) A series of plates for ' A Monograph of the Unarmoured 

 Dinoflagellates,' by Prof. C. A. Kofoid. 



(b) Living specimens of Amphidinium, by Miss C. Herdman. 



SECTION E.-GEOGRAPHY. 



(For references to the publication elsewhere of communications entered in 

 the following list of transactions, see p. 381-) 



Tuesday, August 24. 



1. Presidential address by Mr. J. McFarlane. See p. 98. 



2. Mr. D. Lleufer Thomas. — Some Geographical Aspects 



of the Distribution of Population on the South Wales 

 Coalfield. 



The narrow valleys of the plateau provoke feelings of 

 imprisonment and isolation — originally the coal attracted the 

 raw material of industry, e.g. copper, iron — after 1850 coal 

 was worked in the interior valleys — the Rhondda valley 

 became populous after 1871 and caused the growth of Cardiff 

 and Barry. 



Discussion opened by Dr. A. E. Trueman. Other 

 speakers : Prof. H. J. Fleure, Mr. H. J. Eandall, 

 Mr. A. E. L. Hudson, &c. 



3. Dr. A. E. Trueman. — The Iron Industry of South Wales. 



Iron ore either haematite or ironstone nodules — the iron- 

 stone worked all over the coalfield, but especially the east — 

 the growth of Merthyr Tydfil — phosphatic nature caused a 

 decline in mining — ore brought from Spain, despite transport 

 costs the iron industry persists in its original location. 



Wednesday, August 25. 



4. Lieut. -Col. W. J. Johnston, C.B.E., E.E. — Small-scale 



Maps of the United Kingdom. 



The demand for coloured maps is increasing. Engraving 

 on copper for map reproduction is moribund. Of three 

 methods in use at the Ordnance Survey that dependent on 

 photo-zincography is probably best. 



