MATHEMATICAL PAPERS. cry 
with- that of 1769. A fmall irregularity on the fun’s limb 
feemed.to genou the approach. or firft appearance of the phnet, 
At 2" 30' 14” apparent time, I fufpected I faw a /mall e ifi uf b= 
-ance on the fun's limb : But the impreífion was then fo fmall, 
“irregular, and ill-defined, that it was,not till after feveral feconds 
that I was certain the tranfit. was begun.’ The impreffion i in- 
creafing and growing more diftir@, I fixe] on the time men- 
tioned . Bove as ihe time of the external contadl. By obfervers, 
in the fame: ftate of the atmofphere, with telefcopes and eyes. 
equally good, and fixed on that part of the fun. on which the 
planet entered, Limagine this firt impreffion pot have hero 
obferved to an agreement of five or fix feconds. . Sape 
Soon.after. Venus had firft touched the fun’s limb, Aie r 
of her dic po ble: eres diala, ind, was is für- j: 
ed. From d appearance I cionicleded it per b kk 
to fix upon the precife moment when her limb would be exa&ly 
- coincident. with that. of. the fun, and therefore determined to 
wait till there fhould. appear a {mall thread of light betwe reen 
the As 1:3 internal conta drew near, the 1 ire d of I ight. 
ser to form, and feemed to dart on each fide of the slanet fo; 
feveral feconds. without being fixed or fettled. At 2" 48’ 44 
with a-feeming uncertainty of not more than feven feconds, it 
became: clofed and. fixed.. , Venus then ap eared wholly, within 
- the fun, feparated from his limb by a fine ftream of 1 ght flow- 
ing gently round it. "This I fixed upon as $ the internal toxta. 
Not haying a micrometer, or: hairs fixed in the reflector, inítead 
ef mkg A further obfervations, we could: only enjoy the 
popi: 
