Meeting in Mexico, 1906. 561 



present epoch was the subject of a paper by Professor Freeh, of 

 Breslau, who maintained that this evolution has always progressed 

 in correlation with changes in the proportion of carbon dioxide and 

 aqueous vapour in the atmosphere. A discussion upon this paper took 

 place at the afternoon session. Professor Stefanescu, of Bucharest, 

 described a new species of Dinotherium, viz. D. gigantissimum (Stef.), 

 which he discovered in 1888 at Manzati, in Koumania. This is the 

 first complete skeleton found up to the present time. 



An excursion, in which 190 members of the Congress took part, 

 was made on the following day (9th September), under the auspices 

 of the Mexican Geological Society, to Cuernavaca, 74 miles south of 

 the city of Mexico. Fine views were obtained en route, including 

 a distant one of the snow-capped Popocatapetl. 



On the 10th September the discussion on the condition of climates 

 in geological time was renewed and concluded, and on the 11th 

 a large number of members joined in an excursion to San Juan 

 Teotihuacan, the sacred city of the ancient Toltecs, situated 29 

 miles north-east of Mexico. Here they inspected two pyramids 

 dedicated to the Sun and Moon, the former 216 and the latter 

 151 feet in height. 



The meeting of the 12th September was occupied by the reading 

 and discussion of a paper by Mr. Job. Konigsberger, entitled 

 " Ueber den Verlauf der Geoisothermen in Bergen und seine 

 Beeinflussnng durch Schichtstellung, Wasserlaufe, und chemische 

 Processe." It was followed by papers on the latest eruption of 

 Vesuvius by Mr. Sabatini and Dr. Tempest Anderson, and in the 

 evening of that day the members of the Congress were entertained 

 at a banquet at the palace of His Excellency the President. 



An excursion to the silver-mines of Pachuca was carried out on 

 the 13 th September. 



On the 14:th September Professor A. C Lawson presented his 

 paper on the earthquake of San Francisco, which provoked an 

 interesting discussion. Professor Freeh pointed out the analogy 

 between the Californian earthquakes and those preceding them in 

 Europe, notably that of Dobratsch, in Carinthia. He drew 

 attention to the fact that the earthquake of Dobratsch followed, 

 equally with that of California, a certain tectonic line which was 

 conspicuous both in the mountain formation and in the course of the 

 valleys. He also pointed out the remarkable fact that in neither 

 country was there any true volcanic action. 



A paper, which must have proved interesting to the glacialists. 

 was read by Professor A. P. Coleman, of Toronto, on " Interglaciar 

 Periods in Canada." 



"A Meteorite Crater of Arizona" was the subject of a com- 

 munication by Professor H. L. Fairchild, of Philadelphia, and in the 

 afternoon of the same day Professor Edgeworth David read his 

 paper on the occurrence of diamond in matrix at Oakey Creek, 

 Inverel, New South "Wales. 



Mr. H. F. Eeid, of Baltimore, then communicated an extract from 

 the report of the International Committee on glaciers, and the 



DECADE V. VOL. III. NO. XII. 36 



