ibi.

a

a

a

page
- a Herculis,

295
Pegasi,
Regulus,

296
x Ophiuchi,

297
a Aquilæ,

298
Procyon,

ib.
« Orionis,

299
Serpentis,

ib.
Polaris,

300
Octohedron, the most common form of crystallized bodies, 51
Olive oil, concretions of it found in the human intestines, 150

P
PEARSON, George, M. D. On the colouring matter of the

black bronchial glands, and of the black spots of the lungs, 159
Pond, John, Esq. Astronomer Royal. His observation of the
suminer solstice of 1812, at the Royal Observatory,

27

His catalogue of north-
polar distances of some of the principal fixed stars,

75

His observation of the
winter solstice of 1812, with the mural circle at Greenwich, 123

His catalogue of north
polar distances of eighty-four of the principal fixed stars,
deduced from observations made with the mural circle at
the Royal Observatory,

280

Observations of the sum-
mer solstice of 1813, with the mural cirele, at the Royal
Observatory,

304
Prechtl, M. His theory respecting various crystalline forms
referred to,

62
Prisms, hexagonal, origin of their form in crystallography, 59

R
Rhea Americana, description of its solvent glands and gizzard, 80
Rhomboid, obtuse, origin of its form in crystallography,

S
Sheep, on a new variety in their breed,

88
Sight, obscrvations relative to the near and distant sight of
different persons,

31
Smithson, JAMES, Esq. On a substance from the elm tree
called ulmin,

64

а

page
SMITHSON, JAMES, Esq. On a saline substance from Mount
Vesuvius,

256
Solstice, summer, observation of that of 1812, at the Royal
Observatory,

27
observation of that of 1813, at the Royal
Observatory,

298
winter, observation of that of 1812, with the mural
circle at Greenwich,

123
Spheres, perfect, supposed to be the elementary particles of

fuor spar and such other substances as assume the octo-
hedral and tetrahedral forms,

54
Squalus Maximus, additions to an account of its anatomy con.
tained in a former paper,

227
Stars, principıl fixed, catalogue of north polar distances of
some of them

75
catalogue of north polar distances of
eighty four of them,

281
Struthio Camelus, description of its solvent glands and gizzard, 80
Sulphuret of carbon, or Alcohol of sulphur, experiments on it, 171

experiments to determine the proportions
of sulphur and carbon contained in it,

182
comparison of the proportions of sulphur,
and carbon in it, with those which might be inferred from
the laws of determinate proportions,

189
experiments on its combination with the
the alkalies, the earths, and the metallic oxyds,

192
experiments to determine the nature of a
particular substance produced by the action of nitro-mu.
riatic acid upon it,

195
experiments on the production of cold
by the evaporation of it,

252
T
Tetrahedron and octohedron, relation of these solids to each
other in crystallography,

51
TRIMMER, MR. WILLIAM KIRBY. His account of some
organic remains found near Brentford, Middlesex,

191
Tycho L. TYCHONIUS. His account of a narwhale's skull,
published in 1706, referred to,

127
U
Ulmin, on a substance from the elm tree, so called,

64

a

page

68
256
110

42

Ulmin, English, experiments on it,
Vesuvius, Mount, on a saline substance from it,
Vision, an appendix to Mr. WARE's paper on that subject,
Vitreous humour, its absorption probably the cause of amended
vision in old persons,

W
WARE, JAMES, Esq. His observations relative to the near

and distant sight of different persons,
Wires, on a method of drawing them extremely fine,
WOLLAŠTON, WILLIAM HYDE, M.D. Bakerian lecture, on
the elementary particles of certain crystals,

On a method of
freezing at a distance,

Method of drawing
extremely fine wires,

His description of
a single lens micrometer,

31
114

51

71

114

119