[ I0 7 ] 
XVI. A Determination of the Solar Paral- 
lax attempted , by a peculiar Method , 
from the Obfervations of the lafi Tranfit of 
Venus: By Andrew Plan man, Profefjor 
of Natural Philofophy , in the Univerfity 
of A boa, and Member of the Academy of 
Sciences at Stockholm ; together with a 
Vetter from him to Mr, James Short, 
F. R. S, 
Vir Celeberrime; 
Read March 2 4 >T~^\ U M ante binos annos, in Tranf- 
1768 JL/ a&ionibus Philof. anni 1763, quae 
in Bibliotheca Regias Academic Scientiarum Stock- 
holmenfts fervantur, animadverti te, vir celeberrime, 
exquifttiffimam collocafte operam in inveftiganda 
parallaxi fobs ; mihi propofui, mearum lucubra- 
tionum, in eadem ipfa re, tibi quantocyus facere 
copiam: aft negotiorum multitudine diftentus, hoc 
propofttum differre cogebar ad hoc ufque tempus. 
Adeft quidem aliqaod difcrimen parallaxium, 
quas obtinuimus : fed adfcribendum eft id, partim 
diverfts obfervationum combinationibns, partim quo- 
que diverfe aflumtis locorum longitudinibus, quas 
minime e re fore duxi, obfervationum concilian- 
darum ergo, immutare ; quippe quas, etiam uno 
eodemque loco captas, nimium quantum difcrepare 
P 2 depre- 
