194? PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



At the back of the temple a hot spring L exists. This supplies a 

 bath, which then runs over and mixes with the sea water. 



At low water the tas'e of the water in the channel leading to the 

 sea is that of water impregnated with sulphuretted hydrogen ; at 

 high water it is that of weak sea water. Frogs were observed in it. 



43. About 5 feet below the pavement of the present temple 

 another was discovered very richly ornamented. This may either 

 have been the floor of a former temple, or the bottom of a iDath de- 

 signedly built below the level of the sea. This latter purpose would 

 however have been attended with this inconvenience, that from the 

 extremely small rise of the tides its water would not have been fre- 

 quently changed. 



44-. The circular walls of the inner extremity B are disconnected 

 from those of the temple, as if they had been built at a different 

 period. 



45. In the upper part of the north-west wall of the chamber 27 D 

 are parts of three windows, tvvo of which appear to have been repaired. 

 In the centre window is a slab of marble containing an inscription. 



A considerable crack extends downwards from another of the 

 windows, and there is another crack at the corresponding window 

 on the right, which extends across the whole floor of the room. 



Pebbles were found on the top of some of the walls of the temple. 



46. The Canonico Jorio remarks that the pavement does not ap- 

 pear to have been broken as if by the fall of heavy bodies ; this is 

 generally correct, but the pavement on the step of the sea-side has 

 been removed. 



47. The temperature of the bath into which the water from the 

 hot spring flowed was in June 1828 — 



Bath 99° Fahr. 



Air 77 



A few days previously I had found 



Water in a vessel in the grotto del Cane. . . . 90° Fahr. 



In air 70*5 



In grotto of Fosilipo 65*5 



Facts showing a change of the relative Level of the Land and Sea 

 in the neighbourhood of the Temple of Serapis. 



48. About half a mile along the sea-shore towards the west, and 

 standing at some distance from it, in the sea, are the remains of co- 

 lumns and buildings which bear the name of the temples of the 

 Nymphs and of Neptune. See fig. 3. 



The tops of the broken columns are nearly on a level with the 

 surface of the water, which is about five feet deep. 



49. At the east foot of Monte Nuovo an ancient beach may be 

 seen for about fifty yards, which is two feet higher than the present 

 beach, and which is covered by about seventeen feet of tuflT. The 

 part of this older beach which is nearer to Pozzuoli is covered by a 

 stratum consisting of fine sand, shells, and water-worn fragments of 

 brick and pottery. 



