L 367 3 
plus quam dimidiam gnomonis menfuram efficit : in 
urbe Roma nona pars gnomonis deeft umbra : in op- 
pi do Ancone fupereft quinta trigejima : in parte Italia 
qua Venetia appellatur , iifdem horis umbra gnomoni 
par fit. 
The plain Meaning pf thefe Words is only this, 
that the Length of the Shadow of a Gnomon or up- 
right Style at Noon, on the Day of Equinox, is, in 
Egypt , little more than half the Height of the Gno- 
mon ; that the fame at Rome wants a ninth Part of 
that Heights that at Ancona the Height of the Gno - 
won exceeds the Length of its Shadow, by one 
thirty-fifth Part, or is in Proportion to it as 3 5 is to 
34 s and that, in the Part of Italy which is called 
Venetia , the Length of the Shadow, and the Height 
of the Gnomon , are equal to each other. 
The Particulars here mention'd are refpeftively 
true, in the 4 following Latitudes, 26 0 34', 41 0 38', 
44° io y , and 45 0 . The firft of which is the Latitude 
of the middle Parts of Egypt, and the laft that of 
feveral Places in the Territories of Venice, the City 
itfelf handing, according to Manfredis Table, in the 
Latitude of 45 0 33', and Padua in that of 45 0 2.8 
The Latitude of this laft Place is given by Ptolomy 
44° 30 ; , and that of Aquileia at the Head of the 
Adriatic in the Friuli exactly 45 Degrees. 
The Latitude of Rome , according to Ptolemy 
41 0 40', only exceeds that collected from the Text 
before us by 2 Minutes 5 and his laft again falls fhorc 
J 5 / i of that delivered by Manfredi and Bianchini 
41 0 54 7 ^-. Befides which it may be noted, that the 
very Fadt here mention’d is alfo fpoken of by Vitrii' 
vizis, as Father Hardouin has himfelf in another of 
B b b his 
