934 APPENDIX. 



spherical concave mirror was placed at a short distance, which reflected the 

 light of the sun upon the dial, and by that means projected the shadow of 

 the needle marking the hours. 



At the base of the instrument are inscriptions in Greek characters, but the 

 language in. which they are written appears to belong to one of the Semitic 

 class. A. description of this dial was written by Sr. Saavedra, and published 

 in " Discurso leido en la Academia de la Historia de Madrid, porel Sr. 

 Kada." 



1892a. Solarium, a mechanism for Kinematic demonstration 

 of the real orbits in the solar or the terrestrial system. 



Royal Academy of Industry r , Berlin, Director, Prof. T. 

 Reuleaux. 



In ascertaining the polar orbs (centroids) for the rotation of the earth 

 about the sun, an eclipse is obtained in one focus of which the sun is 

 situated. The polar orb of the earth is a circle, and the latter travels on the 

 ellipse. The curves actually described by the earth are roulettes of this 

 system. The mechanism is arranged for Kinematic adjustment, so that on the 

 one hand the roulettes of the earth in the solar system, and on the other those 

 of the sun in the terrestrial system, can be demonstrated. 



1924f. An Astronomical Symbol in the form of a Phoenix, 

 probably of the beginning of the Christian Era, found at Yecla, 

 Spain. Archceological Museum, Madrid. 



The original in stone is at the Archaeological Museum of Madrid. It has 

 been illustrated and published in Sr. Kada y Delgado's study on his reception 

 at the Academy of History of Madrid. 



1934b. T. B. Crampton's Express Locomotive Engine. 



The peculiarities being a very low centre of gravity and large 

 strong wheels with a minimum of overhanging weight, the whole 

 of the moving machinery being on the outside of the engine. De- 

 signed in 1847. Thomas Russell Crampton. 



Description of Locomotive Model. 



The locomotive was designed by T. R. Crampton for high speed. 



Previous to this engine being designed no express trains were run on the 

 Continent. For this purpose it was selected in 1849 to commence a service 

 between Calais and Paris, since which period to the present time, 1876, the 

 Northern of France express trains have been worked almost exclusively with 

 this system of engine. 



1977a. Indicator of Pressure, marking in points, thus 

 avoiding the difficulty of propulsion. 



Marcel Deprez, 16, Rue Cassine, Paris. 



1977b. Model of Indicator, for steam-engine. 



Marcel Deprez, 16, Rue Cassine, Paris. 



1977c. Dianemometre, or rule, showing the graphic solution 

 of indicator diagrams. Marcel Deprez, 16, Rue Cassine, Paris. 



