572 



Heat. 



No. 54 815 



54816. 1:5. 



54815. 1 = 2. 



54819. 1:3. 



54817. 1 : 3. 



54821. 1 : 7. 



54822. 1 : 5. 



54823. 1 : 



54.815. Weight Dilatometer (Weight Thermometer), Figure, for the same purpose, with s. d. 

 stand and receiving vessel (W. u. E. phys. Prakt., Fig. 93; cf. Chwolson, Physik, 



pp. 58 and 95) 0.16.0 



The vessel D is filled with mercury by the aid of the air pump by plunging it completely in 

 a second vessel containing mercury. When heated in an air bath the mercury passes into the vessel V. 



54.816. - - idem, without stand or catching vessel, Figure (M. P. Ill, Fig. 50 [II, 2, 



Fig. 48]), without mercury 0. 3. 



54.817. - - idem, with straight outflow tube and ground-on cap, Figure (M. P. Ill, 



Fig. 51 [II, 2, Fig. 49]), without mercury 0.5.0 



54.818. 3 Expansion Flasks with very plain graduation on neck, 100 ccm (M. T., Fig. 103) 0. 4.0 



* 54,819. Projection Water Dilatometer, Figure, simply and conveniently arranged (Fr. 



phys. Techn. I, 2, Fig. 3041) 0. 7. 



54.820. Compensated Water Dilatometer after Xoack (M. T., p. Ii5; /tschr. f. d. phys. u. 

 chem. V. 2, 1S8!>. n. 159); the expansion of the vessel is compensated by mercury; 



with stirring device acting by blowing air in 2. 0. 



54.821. idem, after I'oske, Figure (Hofler-Poske, Oberstnfe, Fig. 283 and p. 89:!; 

 Ztschr. f. d. phys. u. chem. V. 2. 1888, p. 12) 1. 5. 



54.822. -- idem, after (irimsehl-Kebensrorff, Figure (Ztschr. f. d. phys. u. chem. U. 

 18, 1905, p. 92), with stirrer. The expansion of the glass vessel is compensated by a 

 corresponding quantity of air | 0. 18. 



ci. ono, 



1680,6111.6193,5715, 

 4703,6142. 



* Can be used with the Projection Apparatus. 



