INTRODUCTION. XX Hi 



Astronomy. 



Star maps, catalogues, globes, orreries, &c. 

 Meridian instruments. 



Arrangements for communicating true time. 

 Altazimuths, zenith-sectors, sextants, &c. 



Equatoreal Telescopes 



Micrometers. 



Driving clocks. 



Special arrangements for 



Celestial photography. 



Spectroscopic observations. 



Thermo-electric observations. 

 Siderostats. 



Applied Mechanics. 



As the Exhibition must be regarded as chiefly referring to edu- 

 cation, research, and other scientific purposes, it must in this 

 division consist principally of models, diagrams, mechanical draw- 

 ings, and small machines, illustrative of the principles and progress 

 of mechanical science, and of the application of mechanics to the 

 arts. 



Properties of Materials. 



Structures at Rest and in Motion. 



Prime Movers. 



Reservoirs of Energy. 



Regulators. 



The Application of the Principles of Mechanics to Machinery 

 as used in the Arts. 



Shipping, Naval Architecture, and Marine Engineering. 



Chemistry. 



Scientific instruments, apparatus, and materials employed in the 

 investigation and teaching of Chemical Science, and in the appli- 

 cation of its principles to scientific purposes. 



Diagrams and models. 



Illustrations of analytical results. 



Specimens of chemicals, (a) organic, (b) mineral. 



Apparatus and fittings for laboratory and lectures. 



Apparatus for gravimetric and volumetric operations. 



Apparatus for distillation and filtration. 



Apparatus for operations by the dry or hot method, such as 

 furnace, blowpipe, &c. 



Refrigeratory apparatus. 



Apparatus for spectrum analysis. 



