192 THE HOLY LAND. 
CHAP, frequent in the vicinity of very antient lakes, 
in the bed of considerable rivers, or by the 
borders of the ocean. Such an appearance 
therefore, in the approach to the Lake o^ Tiberias, 
is only a parallel to similar phaenomena exhibited 
by rocks near the lakes of Locarno and Bolsenna 
in Itabj ; by those of the JVenner Lake in Sweden; 
by the bed of the Rhine, near Cologne in 
Germany ' ; by the Valley of Ronca, in the 
territory of Verona"^', by the Giants Causeway 
of the Pont da Bridon, in the State of Fenice', 
and by numerous other examples in the same 
country; not to enumerate instances which 
occur over all the islands between the north 
alludingtoa particular substance under that appellation. Count Bonrncn 
{see Note 3. p-i^Lvol. II. of this edition) considers tbe ia5«/<<(; form as the 
result of a retreat. This is coming very near to the theory maintained 
by the author : in furtherance of which, he will only urge, as a naor.e 
general remark, that " all crystals are concretionary, and all columnar 
minerals crystals, more or less regular, the consequences of a retreat." 
(l) The town gates of Cologne are constructed of stones having 
the form commonly called basaltic; and similar substances may be 
observed in the walls. 
(3) See the account published by the Abate Fortis, "Delia T''aUe di 
Ronchnel Territorio Veronese," printed at Venice in 1/78. 
(.3) Site " Memoria de' Monti Colonnari diS-E.il Signor Cavaliere 
Giovanni Strange," printed at Milan in 1778, for a beautiful rcpre- 
sentatiou of this Causeway; engraved by Fessard, from a drawing by 
De Feyrenc. Also the representations given in the LXIst volume 
of the Philosophical Transactions of the Royal Society of London, 
Tab. 19. p. 583, &c. 
