( 1^50 ) 
Of en Ciftern of the other. The Parts thus difpos'd, and 
the Stop-cock being turnd, the Con*^ens'd Air proceeds 
ftrongly thro the Swan-neck Pipe, which difcharges it 
into the Horizontal Tube .G. Whofe Currency fo lef. 
fens the Prdlure cf the Atmofphere upon the Gifterns of 
the refpeftive Barometers as to caufc the Mercury to 
dtfcend 2 inches at leaft. And 'tis obfervable. That 
that Barometer which is 5 foot diftant from the Current 
Air is equally affefted, and fubfides parallel with the 
other. Likewife it is to be noted,thatas the Current Air 
is weakned in its force, fo doth the Weight of the Atmo- 
fphere again Encrcafe, and the Mercury in the Barome- 
ters graou ally Afcend, 
IIL An Account of fo7ne EcUpfes of the Sun and Moon^ 
ob/erVed hy Mr Tho. Brattle, at Cambridge, 
ahout. four miles from Bofton in New-Englaiid, 
whence the Dijfcrence of Longitude between Cam- 
bridge London is determind^ from an Qhfer" 
Vation made of one of them at London. 
J. Hodgfon. 
GN the 1 2th of June 1694. in the morning I went to 
the Colledge at Cawbridge^ about 4 miles from 
Boflon^ and obferved, with the Brafs Quadrant there, 
with Tellefcopick Sights, the Rays of the Sun being 
tranfmitted through one of the faid Sights, on a clean 
Paper, parted on a plain piece of Board, and faftned 
at right angles at about a foot diftance from the faid 
Sight, on which Paper Ihad drawn a Circle between 2 and 
gInches Diameter equal to the Suns disk, and within that 
^ftveralConcentrick Circfles dividing the Diameter into 24 
equal 
