INSTRUCTIONS TO JURIES.

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For the Public Service.

Lightness, sufficient solidity for safety, durability, cheapness.

Class VI. —Manufacturing Machines and Tools.

Fitnoss of the Machinery for tho objects sought, economy in tho first cost, durability, andexcellence of workmanship; economy in production, and perfection in articles manufactured ;saving in time, and quantity produced ; economy of maintenance.

Class VII.— Civil Engineering, Architectural and Building Contrivances.

Scienco and skill in Design to obtain tho object sought with tho greatest economy ; fitnessin the application of Materials, success in tho work in which tho Model or Drawing is ex-hibited ; perfection of workmanship in tho Model or Drawing exhibited.

Class VIII. — Naval Architecture, and Military Engineering , Ordnance, Armour ,

and Accoutrements.

Merits of combination in the M odels or Drawings relating to Military or Naval Engineering ;advantages obtained by experiments in carrying out tho means proposed either by Models orI Irawings. Improvements in Arms, Apparatus, or any articles belonging to Military and NavalService or Architecture, to Rigging or other branches of Seamanship , to Accoutrements orEquipments of Troops, their fitness and efficacy ; economy in production.

CLASS IX.— Agricultural Implements. Ac.

In this Class actual trial has been found generally necessary for tho safe award of Prizes ;Field Instruments being tried on the land, and Yard Implements being also set to work, aniltho results exhibited in Numerical Tables.

Class X. — Philosophical Instruments.

Novelty of inventions, or novolty in tho wholo or part of tho instruments ; ingenuity ofconstruction ; now application of old principles ; application of new principles ; improvedbeauty of form ; increased durability, and more extensive application.

Class Xa. —Musical Instruments.

Novelty of invention, novel application of old inventions, improvement of mechanicalaction. Tone, perfection of workmanship, beauty of design combined with general excellence,increased facility of action, cheapness combined with durability.

Class Xn. — Horology.

Ascertained or probable accuracy and certainty of performance, whether time-keeping, dis-charging of striking parts, or registering; stability, strength and durability, simplicity andeconomy of construction, goodnoss of execution. High finish to bo considered subordinateto the scientific objects.

Cl, ass Xo. — Surgical Instruments.

For instruments which possess novelty of a useful character, and giving ovidenco of ori-ginality and inventive power, ingenuity m the application, extension, or modification of prin-ciples already known, or for now combinations, mechanical skill, including cheapness, finish,and other qualities of mechanical execution.

Group C. —Manufactures. Textile Fabrics.

In this, other artielos will bo rewarded which fulfil in tho highest degroo tho conditionsspecified in tho sectional list, namely, increased usefulness, snoli as permanency in dyes, im-proved forms and arrangements in articles of utility, &e. ; superior quality, or superior skillm workmanship ; new uso of known materials ; use of new materials ; new combinations ofmaterials ; beauty of design iu form or colour, or both, with reference to utility; cheapnessrelatively to excellence of production.

Group 1).—Metallic, Vitreous, and Ceramic Manufacture.

Important inventions and discoveries, or regularity combined with excellence of design ;novel application of known discoveries ; great utility combined with economy and beauty ;excellence of workmanship and quality.

Group E.— Miscellaneous.

Novelty of material in application, excellence of design, material, workmanship, andcheapness.

Group F.—Fine Arts.

Originality and excellence of design and importance of tho work, combined with greatmerit of execution ; merit in execution, combined with application to useful purposes.

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