VOL. XLIX.] VHILOSOPHICAL TRANSACTIONS. 655 



15. Of an Extraordinary Alteration in the Baths of Toplitz in Bohemia, on 

 the \ St of November, 1755. By Father Joseph Steplin, of Prague, p. 3C)5. 

 A report being brought that at Toplitz, a village famous for its baths, and Q 



Bohemian miles north-west from Prague, the source of these baths had under- 

 gone some change, in order to know the truth of this. Father Steplin requested 

 the president of the Supreme Royal Council to send him an exact account of it, 

 in answer to the several questions which he proposed to him. By this means he 

 procured the following: that in the year 762 those baths were discovered; from 

 which time the principal spring had constantly thrown out the hot waters in the 

 same quantity, and of the same quality. On the 1st of November, 1755, be- 

 tween 11 and 12 in the morning, the chief spring cast forth such a quantity of 

 water, that in the space of half an hour all the baths ran over. About half an 

 hour before this vast increase of the water, the spring became turbid, and flowed 

 muddy; and, having stopped entirely near a minute, broke forth again with pro- 

 digious violence, driving before it a considerable quantity of a reddish oker, 

 crocus martialis. After which it became clear, and flowed as pure as before; 

 and continues still to do so; but it supplies more water than usual, and that 

 hotter, and more impregnated with its medicinal quality. 



16. Concerning the Agitation of the Waters, Nov. 1, 1755. By Mr. De 



Hondt, of the Hague, p. 396. 

 We had at 1 1 o'clock a phenomenon, which astonished every body. In ab- 

 solutely calm weather there was observed of a sudden so violent a motion in the 

 water, that the ships were struck against each other, and broke the cables which 

 fastened them. It was felt ^t the same time at the Hague, Leyden, Harlem, 

 Amsterdam, Gouda, Utrecht, Rotterdam, and Bois-le-duc. At the Hague it 

 was but slight; and no motion was felt in the ground. 



17. On the same. By M. AUamond, Projessor of Philosophy at Leyden, and 



F.R.S. p. 397. 



Between half an hour after 10 and 11 in the morning, in some of the canals 

 of this city, the water rose suddenly on the quay, situated on the south. It 

 returned afterwards to its bed, and made several very sensible undulations, so 

 that the boats were strongly agitated. The same kind of motion was perceived 

 here in the tuns of water of 2 brewhouses, and in those of 3 brewhouses at 

 Harlem. The branches of the Roman Catholic church at Rotterdam, which 

 hung from long iron rods, made several oscillations. A tallow-chandler at the 

 Hague was surprised to hear the clashing noise made by all the candles hung up 

 in his shop. 



The accounts brought from Norway inform us, that the same observations 

 were made there, almost at the same time. 



