A TREATISE

ON

И.Ш.

MILITARY SURVEYING;

INCLUDING

SKETCHING IN THE FIELD,

PLAN-DRAWING, LEVELLING,

MILITARY RECONNOISSANCE,

&c. &c. &c.

ALSO A PARTICULAR DESCRIPTION OF THE

SURVEYING INSTRUMENTS,

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.

Rebred.60

I.-Prismatic Compass-Taking Bearings-Instruments

and Implements required

Page.

1

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

9

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

filling in

13

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

tures of Ground

16

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

1020100

21

26

39

45
MISCELLANEOUS.

Sect.

Page.

55

X. Of the Protractor and Plotting

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-

72

83

103

111

ridian Line

XV.-Marquois Scales and Triangle-Plotting Scale-

Mathematical Instruments Of Scales-Geo-

metrical Problems, and Tracing Figures on the

Ground, &c.

XVII. Mensuration of Planes - Surveying with the

Chain - Method of conducting a Survey -

Plotting the Survey

116

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.

Page.

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

229

265

285

288

MILITARY RECONNOISSANCE.

XXIII.-General Observations-Heads of Instruction for

Reconnoissance, with Explanatory Remarks-

Precautions during a March-Sketching with-

out Instruments

304