COMMONLY EMPLOYED BY MILITARY MEN, WITH INSTRUCTIONS FOR
USING AND ADJUSTING THEM;

PLATES AND DIAGRAMS.

BY MAJOR BASIL JACKSON,

LATE OF THE ROYAL STAFF CORPS.

THIRD EDITION.

LONDON:

W. H. ALLEN AND CO., 7, LEADENHALL-STREET.

1846.

TO COLL. MECH. ARTS,
SEPTEMBER 20, 1890,

[ENTERED AT STATIONERS'-HALL.]

LONDON: PALMER AND CLAYTON, PRINTER, CRANE COURT, FLEET STREET.

II.-Method of Surveying a Road by the Compass, and

Protracting in the Field

5

III. Of the Simplest Method of Sketching a Portion of

Ground; a Military Position, for instance, with the

aid of the Compass

IV.-Of Finding your Place in a Survey or Sketch when

filling in

V.-Process of a real Military Sketch-Sketching Fea-

tures of Ground

ON SURVEYING WITH THE THEODOLITE.

VI.-A Description of the Theodolite-Its Adjustments in

the Field-Taking Angles-Vernier Scale

VII.—Traversing with the Theodolite and Chain, and Plot-

ting the Survey

VIII.-General Observations on Surveying

IX.-Method of conducting a Survey

102000

9

39

45

XI.-On Plan-Drawing-Methods of Shading Hills, &c. 62

XII.-General Remarks in Surveying, Plan-Drawing,

and Sketching

XIII.-The Pocket-Sextant-Its Adjustments-Use in

Surveying, Measuring Heights and Distances,

&c. The Reflecting Semicircle - Optical

Square-Plane Table

Further Description of the Theodolite, with

an Explanation of its several Adjustments-

Description of the Prismatic Compass

XIV.-Résumé on Surveying Instruments-Of the Me-

ridian Line

XV.-Marquois Scales and Triangle-Plotting Scale-

Mathematical Instruments-Of Scales-Geo-

metrical Problems, and Tracing Figures on the

Ground, &c.

72

83

103

111

116

Surveying with the

Chain - Method of conducting a Survey -

Plotting the Survey.

144

ON LEVELLING.

XVIII.—Observations-Levelling with a Mason's Level—

With Boning Staves-Description of a Spirit-

Level-Levelling Staves-Method of Levelling

with a Spirit-Level-Drawing Sections-Le-

velling with a Theodolite-Tracing Contour

Lines-French Water-Level-Reflecting-Level 167

XIX.-Theory of Levelling-Terrestrial Refraction and

Curvature-Levelling by the Mountain Baro-

meter-To determine Altitudes by the different

Temperatures of Boiling Water

200

Sect.

MISCELLANEOUS.

XX.-Application of Trigonometry to measuring Heights

and Distances-Reduction of Oblique Angles,

taken with a Sextant, to the corresponding

Horizontal Angles-Portable Trigonometry

XXI.-Description and Use of the Large Sextant—Its

Adjustments-Artificial Horizon-Method of

using it--Parallax-Refraction-To find the

Variation of the Needle

XXII. LATITUDE AND LONGitude.

of finding the Latitude

Longitude

MILITARY RECONNOISSANCE.

XXIII.-General Observations-Heads of Instruction for

Reconnoissance, with Explanatory Remarks-

Precautions during a March-Sketching with-

out Instruments

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