No. 55081. 



Ebullition, Solidification, Fusion. 



607 



55 080. 1 : 5. 



r 



55079A 1 : 12. 



55 079 B. 1:3. 



55.073. Papin's Digester for 20 atmospheres, of stout copper with gunmetal top, with safety 

 valve, thermometer and cock (M. P. Ill, Fig. 257). The thermometer is divided to 

 250 C. and plunges in an iron box which "should be filled with mercury . . . . . 



55.074. - - idem, with Spring Manometer 100 mm diameter, Figure (M. T., p. 159). 



55.075. Device after Faraday, for freezing mercury in a powerful flame by means of solid 

 carbon-dioxide, Figure (W. D., Figs. 401 and 402 [381 and 382]; M. P. Ill, Fig. 304 

 [II, 2, Fig. 161]), consisting of cloth bag, stand, plate, small iron vessel on long stem 

 and platinum wound wire triangle; but without platinum crucible and blast lamp . 



55.076. Apparatus for Freezing Mercury by Evaporating Sulphurous Acid, Figure (W. D., 

 Fig. 405 [385]), consisting of a flask with inset, a drying flask, and 6 condensing vessels 



55,077. - - idem, without drying flask 



V).078. - - idem, f or producing temperatures to about 101 C. by a mixture of solid 

 carbon dioxide and ether (W. D., Fig. 406 [386]) 



52,655. Inset for the Oersted Piezometer, for demonstrating the lowering of the melting point 

 of water by pressure, after Thomson (M. P. Ill, Fig. 327 [II, 2, Fig. 95]; Gan.-Eein., 

 Fig. 332) 



This apparatus consists of a lead slab, a sensitive ether thermometer in protecting tube and a 

 manometer. 



55.079. Melting Point Determination Apparatus, Figs. A and B, with stand and thermometer 

 to 360 C. (W. u. E. phys. Prakt., Fig. 98) 



55.080. Apparatus for Producing Ice by the Evaporation of Sulphuric Acid in Vacuo, Figure, 

 after Leslie (M. P. Ill, Fig. 358 [II, 2, Fig. 215]), consisting of one small receiver, sul- 

 phuric acid vessel, and cork dish on tripod, for the air pump 



.V>.osi. Thin-walled Dish of Sheet Copper with Wood Slab after Bb'ttger, for producing ice 

 by evaporation of ether or carbon-disulphide (M. P. Ill, Fig. 362 [II, 2, Fig. 219]) 



s. d. 



5. 4.0 



6. 4.0 



1. 4.0 



0.15.0 

 0. 10. 



0. 12. 



2. 5.0 



1. 0.0 

 0. 3.0 



0. 1. 3 

 53,073. - - i d e m, for the air pump (W. V., Fig. 409), see Fig. 53,073, p. 405, without receiver ! 0. 3. 



Cl. 4545, 

 1820, 1801, 



1821, 

 1802. 



