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GROUP XV.—MUSICAL INSTRUMENTS. 
Section 1.—Keyed Instruments, as Pianos, Organs, Harmoniums, &c. 
Section 2.—Stringed Instruments, as Harps, Guitars, Violins. 
Section 3,—Wind Instruments, Musical Boxes, and other Musical Instruments 
OF ALL KINDS. 
GROUP XVI.—THE ART OF WAR. 
Section 1.—Equipment of Troops. 
Section 2.—General Armament ; Artillery and Military Engineering. 
Section 3.—Sanitary Arrangements. 
Section 4.—Military Education and Instruction; Cartography and Historio- 
graphy. 
GROUP XVII.—THE NAVY. 
Section 1.—Naval Architecture and Hquipment :— 
a. Models and drawings of boats for lake and river navigation. 
b. Models and drawings of sea-going ships, coasting vessels, merchant ships, 
and ships of war. 
c. Stores and fittings for equipment, outfit, and armament of ships. 
Section 2.—Structures for Navigations ; Hydrography :— 
a. Land and water works for navigation, models and drawings of docks, 
harbours, sluices, floating docks, floating batteries, and coast defences. 
b. Hydrography, charts, &c. 
GROUP XVIII.—CIVIL ENGINEERING, PUBLIC WORKS, AND ARCHITECTURE. 
Section 1.—Above-ground Building:— 
a. Building materials, processes, &c. for quarrying, briek making, iron girder 
work, preparation and preservation of wood, artificial stone, &e. 
5. Plans, models, and drawings of public buildings, dwelling-houses, barracks, 
penitentiaries, prisons, hospitals, schools, theatres, labourers’ cottages, 
apparatus for lifting and moving heavy weights in buildings, as lifts, &c., 
plans and models of cheap dwelling-houses, tools and implements of 
artisan builders. 
c. Apparatus and inventions for health, comfort,, and convenience in buildings 
(for lighting, water supply, drainage, waterclosets, lightning conduetors, 
&c.). 
d. Agricultural engineering ; plans for culture, feneing, draining ; farm build 
ings, buildings for cattle breeding; stores, stables, manure tanks, &c. 
e. Industrial buildings, spinning mills, weaving mills, grinding mills, distilleries, 
breweries, sugar manufactories, warehouses, sawmills, docks, &c. 
Section 2.—Hydraulic Architecture :— 
a. Materials and appliances for foundations (pile drivers, screw piles, coffer- 
dams, Caissons, pneumatic and diving apparatus). 
b. Hydraulic engineering works (excluding sea works), river works, canal works, 
dikes, locks, dams, &c. 
c. Models and plans of viaducts, bridges, and aqueducts. 
Section 3.—Making of Roads and Construction of Railways :— 
a. Contrivances and tools for earthworks, exeavators, dredging machines, appa 
ratus for raising, carrying, and transporting earth and materials. 
b. Materials and apparatus used for roads and railways, as road rollers, railway 
superstructure, switches, crossings, turn-tables, traversing-tables, inclined 
planes, lifts, pneumatic and other modes of propelling water stations and 
their apparatus, railway Station buildings of all kinds, and Systems of 
railway Signals.