590 



Thermoscopy. 



No. 54 958 



54 959. 1 : 9. 



54962. 1:10. 



54,958. Accessories for Experiments on Specific Heats, Figure (Experiments Nos. 10 14) ....... 0. IL ; . n 



For shewing the different specific heats of metals and liquids, for determining the ratio of specific 

 heats with unchanged pressure and volume, and for confirming Dulong and Petit's Law on Atomic 1 1 cat. 



2 Copper Pieces and 1 Lead Piece of the same 

 weight and area. 



1 Lead Piece three times as heavy. 

 1 Pressure Flask (Fig. 9). 



54,959. Accessories for Experiments on Thermal Conduction, Figure (Experiments Nos. 15 26) .... 



For demonstrating the different thermal conduction of metals, the influence of the direction of 

 grain in wood, the axial direction in crystals, bad conductors, the influence of specific heat on thermal 

 conduction, the so-called cold conduction, thermal insulators, thermal conduction of different liquids 

 and gases, the decrease of thermal conduction with decreasing gas-density. 



I!. II 



f3 rectangular bent Rods, two of copper and one 



of iron (Fig. 10). 



2 Rods twice bent, of copper and lead. 

 1 Glass Capsule with lead rod. 

 1 Glass Capsule with copper rod. 

 f2 small ground Glass Hemispheres (Fig. 11), with 



cork and board. 



f 2 Wood Slabs, one cut parallel and the other per- 

 pendicular to the grain. 



f2 Zinc Beakers (Fig. 11). 



Slabs of iron, silk, cotton, copper, lead and marble. 

 2 Capsules weighted with shot, 

 f 2 Vessels with cylindrical capsules and with 



si uppers (Fig. 13). 

 2 Vessels for liquids, 2 small hemispheres, 2 sheet 



iron holders (Fig. 14). 



2 Vessels with cylindrical capsules. 2 jjla^s tubes 

 and pierced rubber bungs (Fig. 15). 



54,959a. Small Collection of Accessories for Experiments on Thermal Conduction (Experiments 15. l , and L';!). 

 consisting solely of the accessories marked t in No. 54,959, for demonstrating thermal conduction in 

 metal rods, wood slabs and liquids 0. 12. ( 



54,960. 2 Crystal Plates cut parallel and perpendicular to axis (Experiment No. 19) 



1. 4. 



Cl. 6191, 6186, 

 6189. 



