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PHIPPS’s JOURNAL.
un
~!
it
MISCELLANEOUS OBSERVATIONS.
Odjfervations for determining the Refradiion in high Latitudes.
JUNE the thirtieth, at midnight, the diftance of the two oppofite horizons, taken
by me with Ramfden’s fextant, was 179° 54’; the height of the eye being fixteen feet
above the level of the fea.
Augutt the fifteenth, at midnight, by the aftronomical quadrant, the altitude of
tne {un’s upper limb 4° 16’ 55” lower limb 3° 46’ 07
Error of the quadrant , —— 32 - — — 32
Ve one Uae See 3 45 28
Semidiameter - — 15 51 - + 15 5t
App. Alt. Sun’s center Bivorsae - ATT
Co. Declin. - 75 56 13 2 26 kOe
App. Lat. - F050 Ao 8 oot auic 79 57 32
True Lat. - - FAA ty Br ty sam . cee ee
Refraction - - 12 42 - - £2.20
By Dr. Bradley’s tables 11 18 - - - 12 27
Allowing for the therm. i ae - een aS (engi
Barometer, 29,6 Thermometer, 37°
Auguft the twentieth, at midnight, the fun’s meridian altitude by
Mr. Harvey, - = nd) pg? ai2i5 WOOr, a
Dip — 3 49
. 2:25 TE
Semidiameter + 15 52
oe
Altitude of the Sun’s center CY BONY
Co. Declin. 77 31 26
App. Latitude 80 8 29
Refr. by the tables 16 44
True Latitude 79 51 45
Hakluyt’s Head-land S. by E.
Cloven Chiff - - E.byS. iS.
Variation - - - 19°30’S.
It may not be improper to mention here that Baffin, in 1613, made an obfervation
of the refra€tion when the fun was in the horizon, in latitude 78° 46’, which alfo
agrees exactly with Dr. Bradley’s tables. It may therefore be prefumed that the re-
fractions in the higher latitudes follow the fame law as in thefe.
Specific
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