OF SELBORNE. 315 
barometer in his parlour at Newton Valence. The 
tube was first filled here (at Selborne) twice with 
care, when the mercury agreed, and stood exactly 
with my own; but, being filled again twice at New. 
ton, the mercury stood, on account of the great el. 
evation of that house, three tenths of an inch lower 
than the barometers at this village, and so contin. 
ues to do, be the weight of the atmosphere what it 
may. ‘The plate of the barometer at Newton is 
figured as low as 27, because in stormy weather 
the mercury there will sometimes descend below 
28. We have supposed Newton House to stand 
two hundred feet higher than this house ; but if the 
rule holds good, which says that mercury in a ba- 
rometer sinks one tenth of an inch for every hun- 
dred feet elevation, then the Newton barometer, 
by standing three tenths lower than that of Sel- 
borne, proves that Newton House must be three 
hundred feet higher than that in which I am writing, 
instead of two hundred. 
It may not be impertinent to add that the ba- 
rometers at Selborne stand three tenths of an inch 
lower than the barometers at South Lambeth, 
whence we may conclude that the former place is 
about three hundred feet higher than the latter; 
and with good reason, because the streams that 
rise with us run into the Thames at Weybridge, 
and so to London. Of course, therefore, there 
must be lower ground all the way from Selborne to 
South Lambeth; the distance between which, all 
the windings and indentings of the streams con- 
sidered, cannot be less than a hundred miles. 
