( <45 . 
prafticable, to make any Computation ot [the Depth a Valjey- 
fmksina Century, by marking Yearly the Height of the U^atcr 
on the Stones in the narrow Paflages of the Mountains, becaufe 
of the Annual and even Daily Variations of the Quantfty and 
Force of Water, which depends on the Quantity of Rain, asal- 
foof melted Snow and Ice ;-aslike\vi{e of the Rehifance made 
by Stones and Trees eradicated by the Torrents. 
Betwixt Andtrct and Speluca he takes notice of the frcf^uent ,j 
Catarrhadls on the Rhi'ne-, where the foaming Wateis are fo 
dafh’d againft the Rocky Precipices, that the adjoyning Cliil’s 
are thereby continually Water’d, nor do the Travellers alv\ayse- 
fcape. One of thefe, being that which feem’d mdl Remarkable, he. 
gives us a Draught of, in the 8th Table of his Second JoarKey. Thefe 
Catarrhaffs are alfo not uncommonin the Tenirory ENGEL- i. i, 
BERG-, amongfl; which, that of D 6 VSBACH-, over againft the ce- 
lebrated Mountain T/J'L/S^F^C, affords the pleafanteft ProrpecT. 
But the moft agreeable Caftade he met with in all ^his Travels, is 
on the River ^JMaira, oppofite to the Place^ where tfie Town of 
Elnrs once ftood, which, is now only Fields and Meadows-, that 
being the moft Remarkable of any, for Breadth as well as Depth, 
which he computes to be about icoFoot. The River ha\ing fo 
Great a Fall, the neighbouring Fields are continually bedew’d with 
its conftant fprinkling;, and the Spectators become foon dropping 
wet; which inconveniency the Pleafant Profped not only of the 
Catarrha<fl:, but alfo of a Circular Rainbow they ftand in, makes 
fuch amends for, that ftis not in the Icaft regarded. SUch Raiii' 
bows are alfo feen, at fome CatarrhaCls ofthe Rhine-, as particular- 
ly that noted Waterfall LAVFF in ZVRICH, well deferib’d by 
ClareanM in his Panegyricon Helvetia. 
On the 23d of Ahgnfi he afeended Monte di Sett, or fas the 
Germans Call it )SETMERBERG, which is part ofthe Julian Alps, to 
fee on the top of it the celebrated Springs of three Rivers, at the 
diftance of fcarce twenty Perches : viz., thofe that How North- 
ward, conftitute part of the Rhine', thofe on the South Weft, 
the River Maira, which runs through BERGEL and Clavenna-, 
and thofe on.the Eaft, the Aqua de PiU. But the Mountain about 
the Springs being all cover’d with Snow, his Guriofity was fatis- 
fy’d with the Plants and fome other Rarities that occui’d. 
This Obfervation maybe parallell’d in the Origin of divers of cur 
own Rivers 3 ‘as particularly of the Severn, the Wye ztA Rheidtol^ 
at Pymlymon on the Confines Mongomery ^nd Cardiganjlnre, and. 
X * feveral 
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