16 Dr Whewell's Inaugural Lecture. 



for the general purposes of the Exhibition, to adopt thirty 

 broad divisions ; of which Classes, four were of Raw Mate- 

 rials ; six of Machinery ; nineteen of Manufactures ; and one 

 of the Fine Arts. And these thirty Classes may be consi- 

 dered as having been confirmed by their practical application 

 to the collection, and to the work of the juries in dealing 

 with it; except that, in some instances, it was found neces- 

 sary to subdivide a Class into others. Thus, Class X., which 

 was originally described as Philosophical Instruments, was 

 found to consist of materials so heterogeneous, that there 

 were separated from it three Classes, of Musical, of Horolo- 

 gical, and of Surgical Instruments. And to Class V., Ma- 

 chines, was added an Accessory Class, V a, Carriages. And, 

 on the other hand, Classes XII. and XV., Woollen and 

 Worsted, it was found could be advantageously thrown into 

 one. 



Within these Classes, again, were other subdivisions, 

 which are marked in the Catalogue by letters of the alphabet. 

 Thus, the Third Class consists of substances used for food ; 

 and of these the vegetable division contains Sub-classes, A, 

 B, C, D, E, F, G : the first being cereals, and the like ; the 

 second, fruits ; the third, drinks, and so on. And in like 

 manner, the Sixth Class, manufacturing machines and tools, 

 had Sub- classes. A, B, C, D, E, F : as A, all spun and rvoven 

 fabrics ; B, manufactures of metals ; C, manufactures oftnine- 

 rals and mining machinery, and the like. 



And, again, each of these Sub-classes was separated into 

 Heads, by numbers. Thus, the Sub-class cereals and the 

 like, are 1, the common cereals ; 2, the less common ; 3, mil- 

 let ; 4,, pulse and cattle-food; 5, grasses and roots ; 6, flours 

 (ground grain) ; 7, oil seeds ; 8, hops. And the Sub-class A, 

 of manufacturing machines and tools, included the Heads, 1, 

 machinery for spinning and weaving cotton, rvool,flax, hemp, 

 silk, — for tvorking caoutchouc, gutta percha, hair ; 2, paper- 

 making ; 3, printing. And to shew how much practical ex- 

 perience governed these sub-divisions, I may mention that 

 great aid in this task was found in the Trades' Directories 

 of Birmingham and Manchester, and other great manufac- 

 turing towns. 



