Description, Adjustments, and Mode of Use of the Transit Circle

Dimensions of the Apartment, the Piers, Foundation, &c.

The Reading Microscope-Micrometers

REDUCTION OF THE OBSERVATIONS OF R.A., MADE WITH THE TRANSIT CIRCLE

Page

i

i

i & ii

ii

ii

ii

ii

ii & iii

iii

iv

iv

V

v & vi

vii

vii

vii

vii & viii

viii

viii

ix & x

x & xi

xi

Assumed Mean R.A. of Stars used for determining Clock Errors

xviii to xxi

Differences between the Greenwich and Oxford Results for Mean R.A. of Clock-

Stars, 1862

xxii & xxiii

Personal Equation

Errors and Rates of the Transit-Clock.

Reduction from Apparent to Mean R.A. of Stars

Correction to the Tabular Diameter of Venus

REDUCTION OF THE OBSERVATIONS OF ZENITH DISTANCE

Value of the Screw of the Telescope Declination-Micrometer

Flexure of the Telescope

Errors of the Divisions of the Circle

Table of Zenith Points, and of Runs of the Microscopes

Refraction, Parallax, and Semi-diameter

Assumed Longitude of the Observatory

SEPARATE RESULTS FOR MEAN R. A. OF STARS OBSERVED IN 1862

Page

xxiii

xxiv to xxvi

xxvii

xxvii

xxvii

xxviii & xxix

XXX

xxxi & xxxii

xxxii & xxxiii

xxxiii

χχχίν

XXXV

XXXV

Difference between the Results for R.A. of Polaris as observed at Greenwich

SEPARATE RESULTS FOR MEAN N.P.D. OF STARS OBSERVED IN 1862

Table of the Differences between the Reflexion-Results and Direct-Results for

CATALOGUE OF CONCLUDED MEAN R.A.'S AND MEAN N.P.D.'s FOR 1862,

HORIZONTAL AND VERTICAL DIAMETERS; AND R.A. AND N.P.D. OF THE

Error of the Tabular Value of the Duration of Transit of the Sun's Diameter

Error of the Tabular Value of the Sun's Vertical Diameter

Error of the Tabular Value of the Duration of Transit of the Diameter of the

Observed and Tabular R.A. and N.P.D. of the Sun, Moon, and Planets.

OBSERVATIONS OF R.A. AND N.P.D. OF COMET II OF 1862; AND MEASURES

xlii

xliii

xliii

OF DISTANCE AND ANGLE OF POSITION OF THE COMPONENTS OF

DOUBLE STARS, AND OF THE DIAMETERS OF THE PLANETS VENUS,

MARS, AND SATURN

xli

Description of the Heliometer, where found.

xliv

Diameter and Focal Length of its Object-Glass

xliv

Means provided for giving motion to the segments of the Object-Glass

Illumination of its Scale

xliv

xliv

The Telescope-Tube, when dismounted and examined

xlv

The Position-Circle, Declination-Circle, and Hour-Circle .

Observations for determining the Errors of Position of the Polar Axis.
OBSERVATIONS OF COMET II OF 1862, MADE WITH THE HELIOMETER
Readings of the Declination-Circle and Hour-Circle .
Effects of Refraction and Parallax

Authority for the Distances of the Comet from the Earth

Assumed R.A. and N.P.D. of the Stars of Comparison

Corrections for Index Errors

Mean Solar Times.

MEASURES OF DOUBLE STARS.

Method of Observation

Value of the Scale

Determination of the Zero of the Position-Circle

CATALOGUE OF THE DISTANCES AND ANGLES OF POSITION OF THE DOUBLE

Computation of Lunar and Solar Elements for the time of observation.

Formula for direct computation of the Parallax in Hour-Angle and N.P.D.

Tabulated Values of small Corrections

Formula for variation of Parallax in a given time

Notice of Auxiliary Tables

Separate Results for Mean R.A. of Stars observed in 1862.

Notes to the Observations of the Transit Circle for 1862

Separate Results for Mean N.P.D. of Stars observed in 1862

Notes to the Observations of N.P.D. in the Year 1862

Catalogue of Concluded Mean R.A.'s and N.P.D.'s for 1862, Jan. 1, of Stars

observed in 1862

Notes to the Catalogue of Stars for 1862.

67

92

Horizontal and Vertical Diameters; and R.A. and N.P.D. of the Sun, Moon,

and Planets; and of Comet II of 1862

Observations of the Great Comet (Comet II of 1862), made with the Heliometer

Assumed Mean Places of the Comparison-Stars observed with the Great Comet

of 1862

.

94

107

116

Measures of Distance and Angle of Position of the Components of Double

Stars, and of Planets, made with the Heliometer

117

Catalogue of the Distances and Angles of Position of the Components of Double

Stars observed in 1862

Results of the Measures of the Diameters of Venus

Occultations of Stars by the Moon observed in 1862, with the Equations de-

duced from the Occultations.

163

168

169

170

171

a *

INTRODUCTION TO THE METEOROLOGICAL OBSERVATIONS OF 1862.

The Meteorological Observer, and his duties.

ORDINARY INSTRUMENTS

The Barometer

The Dry and Wet Bulb Thermometers

Page

[1]

[1]

[1]

[1]

Comparison of the Barographic Results, reduced according to the assumed Scale,

Comparison of Results of Thermograph and Hygrograph with the Readings of

the Standard Dry and Wet Thermometers

Situation of the Thermograph and Hygrograph

The small Robinson's Anemometer

Accidents to the Anemograph and small Robinson's Anemometer .

The Hyetograph and Electrograph

DAILY RESULTS OF METEOROLOGICAL OBSERVATIONS .

Mean Daily Readings of Barometer and Thermometer

Max. and Min. Temperatures

[3]

[4]

[4]

[4]

[4]

[5]

[5]

[5]

[5]

[5]

[5] & [6]

[6]

[6]

[6]

[6]

[6]

[6]

[7]

[7]

[7]

[7]

RESULTS FOR THE DIRECTION AND VELOCITY OF THE WIND; QUANTITY OF

RAIN, AND DISTRIBUTION UNDER DIFFERENT WINDS; QUANTITY OF

OZONE, &c. .

[8]

.

Method of deducing the Mean Two-Hourly Direction and Velocity of the

Wind for each Month.

[8] & [9]

General Changes of the Wind for the Year

Relations of the Pressure and Temperature of the Air under different Winds .

[9]

[9]