PHYSICAL SCIENCE. 1017 



4024. Russian Trade Abacus. 



4025. Collection of Measures, for use in schools. (Long, 

 superficial, and solid measures, weights, &c.) 



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GEOMETRICAL APPARATUS. 



4027. Board, exhibiting square foot divided into square inches. 

 Made by the St. Petersburg Workshop for School Apparatus. 



4028. Cubic Quarter Arshin, divided into cubic vershoks. 

 Made by the St. Petersburg Workshop for School Apparatus. 



4029. Collection of Geometrical Forms, with sections. 

 17 models. Made by Stroukoff. 



4030. Collection of 37 geometrical forms intersecting each 

 other. Made by Stroukoff. 



4031. The Cube of two, the cube of three, the cube of a 

 binomial and a trinomial quantity. Made at the St. Petersburg 

 Workshop of School Apparatus. 



4032. Large Cone, with sections and hemispheres for deter- 

 mining the focus of curves. Made by Stroukoff. 



4033. Sphere with sections. Made by Stroukoff. 



4035. Apparatus for demonstrating the theory of projections. 

 Made by Schildknecht. 



4038. Collection of class school apparatus for geometrical 

 drawing. Made by Stroukoff. 



4039. Manuals and Exercises on all branches of mathematics 

 and geometrical drawing ; treatises on the method of instruction 

 in these subjects, adopted in the military schools of Russia. 

 Published by Fenoult. 



MAPS, DIAGRAMS, MODELS, AND OTHER APPLIANCES FOR 

 TEACHING GEOGRAPHY AND ASTRONOMY. 



4040. Apparatus illustrating the Motion of the Planets in 



general, and demonstrating the periods of the transit of Venus in 

 particular, by Kachovsky. 



4042. Geographical Pictures on glass for the magic lantern, 

 by Ermolin. 



4043. Atlas of Relief Maps. Published by the Juvenile 

 and Pedagogical Library in Moscow. 



