PHYSICAL SCIENCE. 851 



4005. Apparatus illustrating the Expansion and Fusion of 

 Bodies from Heat, constructed under the direction of the Physical 

 Section of the Pedagogical Museum. 



4006. Slides, with weights, for illustrating the force of Cohe- 

 sion, constructed under the direction of the Physical Section 

 of the Pedagogical Museum. 



4007. Parallelogram of Forces. By Lermontoff. 

 4003. Graham's Inclined Plane. By Lermontoff. 



4009. Hauler's Lamp, with Gasometer. By Lermontoff. 



4010. Parrot's Barometer. 



4011. Caoutchouc Electrical machine. By Kresten. 



4012. Apparatus for preparing Oxygen. By Kresten. 



4013. Condensator. By Epinu. 



4014. Apparatus for Freezing Water by means of the 

 Galvanic Current. By Lenz. 



4015. Agometer or Rheostat. By Jacobi. 



4016. Galvanoplastic Apparatus. By Jacobi. 



4017. Lamp, with pulverizer (for melting). By Shpakoffsky. 



4018. Dry Galvanic Element. By Kresten. 



MATHEMATICAL INSTRUMENTS. 



4019. Board, with set of pegs, for exercises in'studying num- 

 bers from 1 to 1000. Made by Fenoult. 



4020. Arithmetical Boxes, for exercises in numbers. Made 

 by Fenoult. 



4021. Hachoffsky's Class Abacus, for integers and frac- 

 tions. Made by Fenoult. 



4022. Rachoffsky's Abacus, constructed on the system of 

 the St. Petersburg Workshop of School Apparatus. 



4023. Nomansky's Abacus, for integers and fractions. 



4024. Russian Trade Abacus. Made by Fenoult. 



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

 superficial, and solid measures, weights, &c.) Made by Fenoult. 



3H 2 



