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. My Father, Dr. J. J. Scheuchzer, in his Journeys 
over the Mountains of Swifferland , as they were 
more particularly calculated for the Improvement of 
Natural Philofophy in its feveral Branches, negleded 
no Opportunity, along with his other Obfervations, to 
make fuch Experiments with the Barometer, as might 
ferve to illuftrate the Qualities of the Air, to fettle the 
refpective Heights of Places, and particularly to fhew, 
how much our Mountains rife, as well above the Level 
of the Sea, as above other neighbouring Mountains in 
France , Italy, Spain, <Scc. Many of thefe Obferva- 
tions are fcattered up and down in his Writings, parti- 
cularly his Itinera Alpina, and the feveral Parts of 
his Natural Hifiory of Swifferland, which laft Work 
was publilhed in High German. It would be too te- 
dious to mention all the Experiments he made at dif- 
ferent Times, and upon different Mountains. But my 
Defign in this Paper requires me to be particular in 
one, which for the Height meafured both with the Line 
and Barometer is, I believe, the moft confiderable that 
ever was made, and which enabled him more parti- 
cularly to examine the two Tables made by CaJfini the 
Younger, according to the Rules of Mr. Mariotte, and 
the Obfervations made by him and others, when the 
Meridian Line was. perfected in 1703. 
This curious Experiment was made in the Year 1709, 
at Tfeffers, a celebrated Mineral Water in the County 
of Sargans, at the Bottom and Top of a Mountain, 
which rifes from a fmall Brook, called the Taminna , to 
the Height of 714 Faris Feet, as appeared by letting 
a Line drop down perpendicularly from a Tree at Top 
full to the Bottom. At the Bottom of this Mountain, 
near the Taminna, the Mercury was by repeated Ex- 
periments 
