New Barometer. 151 
Kent, have lately found three bullets, nearly thirty feet from the 
surface, in the solid clay; they are of an oblong form, and the 
lead is so pure that when cut it exhibits a beautiful metallic lus-. 
tre; the surface is covered with a green colour, resembling in 
appearance clay when combined with pyrites.. No probable 
conjecture can be formed as to the manner and time of their de- 
position; for neither local circumstances, nor the primary stra- 
tum in which they were found, can lead to any satisfactory ex- 
planation. Several shells have also been found in the secondary 
stratum, one of which is particularly remarkable, exhibiting in 
its interior a mass of minute crystals of selenite, which seems: 
clearly to prove that the crystallization of this mineral has taken 
place subsequently to the deposition of the shell, and therefore 
may be considered, comparatively speaking, as of recent forma- 
tion. The fossils are carefully collected by a gentleman in the 
neighbourhood, and are intended to be exhi! bited at the cottage 
on the hill, whenever their number shall be worthy of notice. It 
is a singalar circumstance, that the masses of clay which acci- 
dentally fall down exhibit, in every instance which has yet oc-, 
curred, an inclined plane of 40 degrees—and the surface of these 
planes, which the workmen call ios are covered over usually to 
the depth of a quarter of an inch, with an exceedingly soft species 
of clay, of a blueish colour. The work on the hill is now going. 
on very well, considering the difficulty which arises from the 
falling in of ‘the earth at the sides from the want of tenacity in 
the clayey soil. 
NEW BAROMETER. 
We understand (says an Edinburgh new ‘spaper) that an instru- 
ment has lately been invented by Adie, optician, Edinburgh, which: 
auswers all the purposes of the common barometer, and has 
the advantage of being much more portable, and much less liable 
to accident. In this instrument the moveable column is oil, in- 
closing in a tube a portion of nitrogen, Ee changes its bulk 
according to the density of the atmosphere. Mr, Adie has given 
it the name of symptesomeler (or measurer of « raph esata: “One 
of these new instruments was taken to India in the Buckingham - 
shire of Greenock ; and by directions of Captain Christian cor- 
responding observations were made on it and on the common 
marine barometer every three hours during the voyage. The 
result, we are informed, was entirely satisfactory—the new in- 
strument remaining nnaffected by the violent motion of the ship. 
We may add, that the sy mpiesometer way be made of dimen- . 
sions so small as to be easily carried in the pocket, so that it is 
likely to be become a valuable acquisition to the geologist. 
K 4 LECTURES, 
