494 '^^'^Messrs, Playfair and Joule on 



CnMi'de ofSlMikm, NaCl= 58-78.— The whole of an equi- 

 valent of this salt, previously decrepitated, dissolved in 1000 

 grains of water at 60° with a rise of 18*0; and in a second 

 experiment of 18-2 ; in a third experiment 118 grains of salt 

 were dissolved in 1000 grains of water at 62° with an increase 

 of 38-0. • ,..;L;,:i.j. 



I. NaCl, vol. in solution 18'0 



j!"ji ii ):■ iiiM'io •)?f,**y'LU nr.M' 18-9 ■i., noiiuloa. 



Mean . . 18-3 c'^oa-iirt 

 80 grains of salt were treated as described (page 457)? in 

 the mercurial volumenometer, and the empty part of the tube, 

 after the restoration of the mercury, showed a volume of 40*0. 

 The same quantity thrown into alcohol previously saturated 

 with it, gave an increase of 39-5. The whole of an equivalent, 

 58-78 grains, thrown into a saturated solution, caused an in- 

 crease of 29-3. ' '^^^ hliiov <'.no'1uiCi vhilib nilnoa oilfihii 



•:'''! I. Na CI, vol. of salt 29*-4nyiTiiT3^e£^niwoJJol 



^ -w'. lif! .miIv-'.i!J<Kj..jo jii;;;oJ.<lo oi29'0 M^'H^QfSB^di ^^Ihh 



' '"'•*"'! ■IIM/smo-uhrd oJ«t b.0gof;' 29'3 - *;; 2-006 nt gniv 



<iu ifiv/ r)i1i\i-^^^\o .nai: 29-23 ... 2'0ilJii&'viuta 



Bromid^'6;^hMUk,m m+'mO = 1 28-70.— On m^^Mng 

 25-7 grains of this salt in water, an increase of 9-2 was occa- 

 sioned in two experiments at a temperature of 53°. 

 I. II. Na Br + 3H0, vol. in solution 46 



The same quantity of salt put into turpentine , ,^u^{J- an 

 mcreaseof 11. j^,,; ^df^nUni lo yJijmo'Xiiojd lo oniui 



Na Br + 3HO, vol. of «alt 65 •..^* 2^40 .m, ■ 



Chloride of Barium, Ba CI + 2HO = 122-83,— 30*7 grains 

 dissolved in 1000 grains of water, increased 7'0 at a tempera- 

 ture of 58°; a second experiment, in which 20 grains of the 

 salt were dissolved, gave an increase of 4;4^'y -i^^^^.Y, ;,..,, -..^.^ 



I. BaCl + 2 HO vol. in solution ft.>38?0 .tnalfiv 



II. ''^' HI v,iiMiii:j<[i ..jt i..i;; ! ( ! , i.27'{6 yxoni an 

 ic b'HiMi^ean"!;-':^ TfiT^f-nniru] 

 The fourth of an equivalent, 30-7 grains, beifig' IWfflef-feed 

 in a saturated solution, gave an increase of 9*7 at a tempera- 

 ture of 60° ; and the same quantity in two other experiments 

 gave an increase of 9*8. 



