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LONDON INTEKNATIONAL 
missioners, with the addition of a certain number of British 
and colonial jurors ; the whole number of juries corresponding 
to the number of the industrial classes and sections, in which 
alone awards were to be made; and the number of members 
ranging from 5 to 18, according to the importance, difficulty 
or complexity of the class. Each class jury had its chair¬ 
man, (appointed by the Eoyal Commission,) and these chair¬ 
men together, constituted a Council with supervisory control. 
Assistants and experts could be called to the aid of any jury 
when needed. 
THE EULES GOVERNING THE ACTION OF JURORS 
were just and reasonable ; evincing an honorable purpose on 
the part of both Royal Commission and Council to ensure 
impartial and correct awards. The following is the substance 
or some of the more important: 
Medals to be awarded without reference to nationality. 
All medals of one kind, without gradations, and to be awarded for merit, 
without any distinction of degree and without reference to competition be¬ 
tween producers. 
Medals in the division of Raw Materials to be awarded for novelty in the 
mode of obtaining, applying and adapting raw materials and produce ; for 
skill and excellence in known methods of obtaining, applying or adapting 
them; for excellence in the qualities obtained, combined with utility; for 
the value of the instructions of any series exhibited 
Machinery to be rewarded on the basis of fitness for the object sought to 
be obtained, economy in first cost, durability, economy in maintenance, and 
excellence of workmanship. 
Carriages for transport and for the public service to be rewarded on the 
basis of lightness, with sufficient solidity for safety, durability, and cheap¬ 
ness ; those of luxury, to be considered with reference to the successful ap¬ 
plication of any new material, with elegance of design and excellence of 
workmanship, strength, lightness and reasonable cheapness. 
Agricultural and Horticultural Implements to be rewarded on the condi¬ 
tions commonly adopted by the leading agricultural societies in making their 
awards 
Civil Engineering, Architectural and Building Contrivances to be consid¬ 
ered with reference to science and skill, with economy ; fitness in the appli¬ 
cation of materials; success in the work in which the drawing a model is ex¬ 
ecuted, perfection of workmanship in the model and drawing exhibited. 
Military Engineering, &c., and Naval Architecture to be rewarded on ac¬ 
count of meritorious combination in the models or drawings; advantages ob¬ 
tained by experiments in carrying out the means proposed; actual improve¬ 
ments in design, marked by fitness, efficiency and economy of production. 
Philosophical Instruments, for novelty of invention, ingenuity of construc¬ 
tion ; new application of old principles; application of new principles; im¬ 
provements in beauty of form ; increased durability ; extended applications; 
excellence and precision in workmanship, and economy of production. 
Photography to be rewarded on the same conditions as attached to philo¬ 
sophical apparatus. Photographic impressions, for novelties in the mode of 
