XXIX 



instructive example. — In answer to a question from Mr. H. 0. 

 Eemfry, Dr. Barham said his diagrams referred to the preceding 

 year only ; but they coincided fairly with usual conditions. He 

 added that, a few years since, Professor Daubeny published a list 

 of plants which flourished at Grove Hill, Falmouth, and at Scilly, 

 but which would not grow at Greenwich ; and yet there were parts 

 of this county where, with a north-easterly wind, the temperature 

 was as low as at Greenwich. 



From considerations of the differences of temperature existing 

 in Cornwall, Dr. Barham inferred its advantages in regard to 

 botanical pursuits and also for sanatory purposes. He also stated 

 that at Scilly, where tropical plants thrive exceedingly well, the 

 temperature scarcely falls beloAv 29 or rises above 80, and he 

 suggested for consideration by Geologists whether any great 

 increase of so equable a temperature would be necessary for the 

 flora discovered in our coal beds. 



Mr. Pengelly stated that his own results, especially from the 

 North of Devon, were quite in accordance with those of Dr. 

 Barham in regard to the great diff'erences of the rainfall produced 

 by local causes inrplaces very near to each other. 



Mi\ E. W. Fox remarked that plants, Benthamias for instance, 

 had suff"ered much at Grove Hill in December last ; harsh winds 

 being often more destructive than mere lowness of temperature. 



Dr. Barham gave an account of the Eoman Coins presented 

 to the Institution by Mr. Williams of Caerhays Castle. They 

 were 30 in number, and Avere part of a much larger collection 

 accidentally found by workmen, in the vicinity of Caerhays Castle, 

 in the autumn of 1869. The entire collection comprised coins of 

 13 emperors or so-called emperors who were in power between 

 A.D. 253 and 276 ; besides two specimens, of uncertain date, 

 and indistinct. They were found in a tin jar ; that tin had been 

 analyzed by Mr. E. Pearce of Swansea, who stated that he had 

 detected in it traces of iron and copper, but that its quality was 

 as good as that of common tin of the present day. This Insti- 

 tution had been favoured Avith 30 of the coins; being. six distinct 

 types of each of five rulers, — two of them being emperors, and 

 the others being some of the "tyrants" raised to the imperial 

 purple by the soldiery, and enjoying but brief periods of rule. 

 The coins were a valuable addition to the numismatic collection 

 in the Museum, gtnd were illustrative of the ancient history of 

 Cornwall. It had been suggested by Mr. Albert Way that it 

 was very desirable to bring together all means of illustrating the 

 state of Cornwall during the period of Eoman sway in Britain ; 

 and it was hoped that Mr. J. Jope Eogers, who had given special 



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