330 Reports & Proceedings — Geological Society of London. 



these waters properly corrected. Mr. E. W". Shaw has spent some 

 time studying these features, and the result of his work will be 

 found in Professional Paper 85 B, Dept. Interior, United States 

 Geological Survey, 1913. At most this paper professes to be a brief 

 summary, but the author's observation lead him to state " the facts 

 that the mud lumps are by far the thickest bodies of clay found. 

 in the Delta and that the clay is overlain and underlain by materials 

 similar to those found elsewhere throughout the lower end of the 

 Delta suggest that they are produced by a squeezing of the soft 

 layers and an accumulation of clay from such layers in places where 

 the pressure is less strong, and that the lumps are not upheaved 

 by any such force as volcanism or by pressure from the accumulation 

 of salt, sulphur, or gas below the surface ". 



6. JSTew York State. — So many scattered papers have appeared 

 on the geology of parts of New York State that it is a boon to find 

 that William J. Miller has thrown the whole into a comprehensive 

 and readable general account, clearly written and admirably supplied 

 with maps and illustrations. The 130 pages are divided into 

 Introduction, Physiographic Provinces, Structure and Drainage, 

 Pre-Cambric, Palaeozoic, Mesozoic and Cainozoic History, Appendix, 

 and Bibliography. It forms Bull. 168 of the New York State 

 Museum, 1913 (1914), and is issued at 40 cents. 



7. Saratoga. Springs. — In 1912 J. F. Kemp wrote a report on 

 the springs themselves, and now Messrs. Gushing and Ruedemann 

 have issued a memoir on the district. The rocks are Pre-Cambrian, 

 Cambrian, Ordovician, and Pleistocene (Glacial), and a general 

 description with lists of fossils is given. Several plates show that 

 remarkable Cambrian structure known as Cryptozoo7i proliferum 

 first described by James Hall. The relation of the geology of the 

 area to Burgoyne's campaign forms an interesting, if unusual, chapter 

 in a geological memoir. 



I^.EIPOIiTS ^^IT3D ZPE-OOEElIDIITGrS. 



Geological Society op London". 

 May 13, 1914. — Dr. A. Smith Woodward, F.R.S., President, in the 



Chair. 



The President mentioned that, on the proposition of Mr. E.. H. 

 Tiddeman, President of the Yorkshire Geological Society, a conference 

 would be held in Leeds next autumn to discuss thoroughly the 

 Glacial phenomena of the North of England. 



Mr. John Parkinson exhibited («) a few specimens of the old 

 lacustrine beds from the neighbourhood of Lake Magadi, on the 

 borders of British and German East Africa ; and (b) specimens of 

 soda and silica from the lake itself. The former consist of un- 

 consolidated ash, fine silts with Planorbis, and diatomite. These 

 beds in places are probably over 100 feet thick. With the soda is 

 associated silica, which fringes some fault-scarps and forms narrow 

 ridges in the lake itself. 



II 



