1851 Great Exhibition: Official Catalogue: Class X.: Elliott and Sons
320. ELLIOTT and SONS, 56 Strand — Manufacturers.
Magazine case of drawing instruments. The same, containing every requisite for drawing circles from the 1-100th of an inch to 6 feet in diameter; elliptical instruments, complete set of scales, standard measure and triangles, also complete set of water colours.
Improved dumpy-level, being simple in its adjustments, and strengthened by having the bar which supports the telescope placed vertically instead of horizontally.
The same with compass. 5-inch and 6-inch transit theodolites.;30-inch transit instrument.
New instrument for measuring the distance of accessible and inaccessible objects.
Opisometers, or map-meters, for measuring curved lines.
Wheel and pediment barometers, carved to illustrate the four seasons.
Gothic barometer.
Ebony and gold barometers.
Astronomical telescope.
Naval and military telescopes.
Opera-glasses, with variously-coloured bodies.
Scale, with slide, for comparing the following measures:— Swedish, Turkish, Bavarian, Spanish, Portuguese, Moscow, Russian, Amsterdam, Rhynland, French, and English.
Standard English yard.
Improved slide-rule, adapted for the use of the practical engineer, having all the necessary tables for calculating metal, earth, and wood works, with useful foreign measures.
Thermometers.
15-inch azimuth and altitude instrument.