410 Chronicles of Science. [July, 



tioned publication is Dr. Oldham's Eeport for 1869, in which the 

 Director sets forth not only the labours accomplished by his com- 

 paratively small staff, but also sketches out their projected labours 

 for 1870. In speaking of the enormous area which the Indian 

 Survey has to traverse, Dr. Oldham remarks, " I have always found 

 it exceedingly difficult to lead to a just conception of the immensity 

 of the areas we have to deal with in this country, and it may be 

 useful to draw a comparison here which may tend to a realization of 

 the facts. The small map, which accompanies Mr. Mallet's Eeport (a 

 reduction from the larger scale maps used in the field), the title of 

 which we quoted above, represents an area quite as large as Eng- 

 land and Wales ; while all the lines of geological division and sub- 

 division shown on it have been actually traced out by detailed 

 examination. 



The previous Part of the Memoirs (the last Part of vol. vi.) con- 

 tained also a geological map of quite as extended an area ; that is to 

 say, geological maps and reports have been published within twelve 

 months, exhibiting the structure of a country larger in area than the 

 whole of Great Britain and Ireland ; and to this should be added 

 that the maps relate to a country, regarding the structure of which 

 nothing trustworthy was known previous to the Geological Survey 

 commencing their labours. 



Two other papers appear in the same Part, namely, " Notes on 

 the Geology of the Neighbourhood of Madras," by E. Bruce Foote, 

 F.G.S., and " On the Alluvial Deposits of the Irawadi, more par- 

 ticularly as contrasted with those of the Ganges," by W. Theobald, 

 jun., Esq. 



Under the title of ' Eminent Living Geologists,' the Editor of 

 ' The Geological Magazine ' has published an account of Professor 

 Adam Sedgwick, of Cambridge, and Mr. G. Poulett Scrope, F.E S. : 

 both these gentlemen have attained to the highest honours in geo- 

 logical science, and have contributed largely towards its literature. 

 The former, as the Woodwardian Professor of Geology in Cambridge, 

 has delivered fifty-two courses of lectures in the University ; the 

 latter is the well-known author of the ' Volcanoes of Central 

 France,' published so long ago as 1827, and of many other works 

 on Yolcanoes, &c. Both notices are accompanied by well-executed 

 portraits. 



In the same journal Professor Huxley gives us the results of 

 his examination of Palseotherium magnum ; * Professor T. Eupert 

 Jones, the South Wales Entomostraca ; t Professor de Koninck, of 

 Liege, some new Palaeozoic Echinoderms ; \ Professor Harkness, of 

 Elephant-remains in Ireland. § Mr. James Croll accounts for the 

 Boulder-clay of Caithness ; Mr. Charles Lapworth explains the 

 Geology of Galashiels ; Mr. Henry M. Jenkins, the Geology of 



* P. 153. f P- 214. t P. 248. § P. 253. 



