A Catalogue of Instruments,

I.

Sectors of a new Construction-— 2

Ditto-4

Ditto - 6

Ecliptical Compasses of a new Con-struction -— 5

Gunners Calippers-• 1

Gunners Quadrants -<- 2

Perpendiculars for Gunnery - 1

Parallel Rules, two and three Feet

Pocket Rules, Gauging and otherSliding Rules, Gunter Scales, Sur-veying and Navigation Scales, withall other Kind of Scales and Rules,at the usual Prices.

Plane Tables for Surveying Land — 3Ditto of a new Construction, with

a brass-headed Staff-15

Theodolites with plain Sights- 5

Ditto with Telescopic Sights, and

Vertical Arch- 12

Ditto, of the best Sort-21

Gunter’s Chains- o

Levels, of the latest Construction — 7

Ditto, larger- 12

Protractors, from 2 s. 6 d. to- 1

A new Protractor for Setting off An-gles to a Minute --—- 4

A new Plotting Scale with a Nonius

Division- 4

Pantographers for reducing and en-larging Plans and Drawings -- 5

Measuring Wheels-■ 6

Pedometers-5

Way-Wisers for Wheel-Carriages — 5

s. d.2 O

4 O6 o

5 o

15 o12 6

11 6

Q. 6

o o5 o

10 oo o7 67 o12 o10 o

4 o

4 o

5 o

6 o5 o5 o

Astro-