\,.. .-,:, i'.'T. 



Heat on Compression. Mechanical Equivalent of Heat. 



627 



55 222. 1:4. 



55 223. 1 : 4. 



55 226. 1 : 9. 



55225. 1:7. 



55 227. 1 : 10. 



55.L'L'5. Gore's Ball, Figure, rotating by heat (Eisenlohr, p. 532) 



The ball, 30 mm diameter, is solid so as to ensure good contact. If the ball and the track are 

 well polished the experiment acts very well with an accumulator cell or a good Bunsen cell. 



53,199. Trevelyan's Rocker: see Pig. 53,199, p. 420 



For other patterns, see Xos. 53,200/1, p. 420. 



.").:, 050. Apparatus after Puluj, for determining the Mechanical Equivalent of Heat; for placing 

 on the whirling table, F i g. 52,050 p. 285 



52.051. -- idem, with Whirling Table No. 51,949 



55.226. - - i d e m, with large Driving Stand, Figure, and with thermometer divided in 

 V 10 (W. D., Figs. 418 421 [394397]; M. P., Ill, Fig. 406 [II, 2, Fig. 254]) . . . 



The inner cone is completely insulated by ivory. The type of instrument is excellent, and the 

 experiment can be carried out with great accuracy. The driving stand can be used as a whirling table 

 on removing the device for Puluj 's experiment. 



Km Patterns with Electric Motor drive, also Accessories for same, see under Nos. 52,052 

 52.055 and the illustrations on p. 286. 



55.227. Apparatus after Grimsehl, for Determining the Mechanical Equivalent of Heat, F i- 



g u r e, witli manometer, which serves as an air thermometer (/tsehr. f. d. phys. u. chem. 

 I"., 16, 1903, p. 290), with cramps for screwing to the lecture table 



s. d. 

 1.14.0 



0. 15. 



5. 5.0 



7. 0.0 



9. 0.0 



' 3. 10. 





f.'l. 1013, 1014, 

 1877,3861. 



4102, 



40* 



