462 Messrs. Play fair and Joule on 



eleventh atotii of water been combined it should have been 



121. ■ ' ■' ' ■■ ■■■' -.''iv);- .> /: .;i,. riu\ 



^Bibardit'fif ^orf/*, Na0;'2BO3 + \0UO^'l^l^9/^..i^^d 

 dissolving 40 grains of this salt in 1000 of water, the increase 



was 19'2 at a temperature of 55°. ' ;>- ^ • 



NaO, 2BO3 + lOHO, vol. in solution 91-7li «« djiw 



Half an equivalent, or 95*61 grains, on being placed in a 



saturated solution, occasioned an increase of 55*5; and 47*8 



grains caused an increase of 27*5; both experiments being 



made at a temperature of 55°. 



Sp. gr. 



I. N^O, 2BO3 + lOHO, vol. of salt 111 ... 1-722 



II. ... ... ... 110 ... 1-738 



Mean . . 110-5 ... 1-730 

 Chloride of Strontium, Sr, CI + 6HO = 133-32.— There 

 are two hydrates of chloride of strontium, the one with nine, 

 and the other with six equivalents of water. To determine 

 which of these hydrates was under examination, 4'324grammes 

 were heated to redness with a loss of 1*75 gramme = 40-47 

 per cent., showing that the hydrate was that with six equiva- 

 lents of water, which gives by calculation 40*50 per cent. 



On dissolving 40 grains of this salt in 1000 of water, the 

 increase occasioned at a temperature of 5Q° was 16*0; a se- 

 cond experiment, in which the same Quantities were used, 

 gave exactly the same result. '^ J^idi nifiiiso aJiop -ei Ji aonsH 

 I. II. Sr CI + 6HO, vol. ih'sblufibn SS-S.- ' •'/7 m 



The same quantity of salt (40 grains), immersed in a ^Ui- 

 rated solution, caused an increase of 20*0 at a temperature of 



57°; and on a second experiment of 19-7. 



^ ■ ' - ci<)<'ivif> Ji J: g p_ .jrriDl 



I. SrCl + 6HO, v<il.offeait 'e6'6f"'... 2-600' ''of!^ 

 II. .":»', ^^'f '';[;;''' \...^^'''-' 65^6 ... 2-030 ^i '^^) 



Mean' . . 66-1 ... 2-015 



Chloride of Calcium^ Ca CI + 6HO = 109-92.— On dis- 

 solving 55 grains, or the half of an equivalent of this salt, in 

 1000 grains of water, an increase of 28*0 was obtained at the 

 temperature of 70°; and in a second experiment 27*6 at 60°. 

 „!,.,,.,, I. Ca CI + 6HO, vol. in solution 56-0 ■,""': 



- n. , .,f.,,,,, ,,;.j,,i,^ ... 55^ 



<)7 9ilj 98irj WO Mean . . 55-6 

 The same quantity of salt thrown into turpentine caused an 

 increase of 32*7 and 32'8 in two experiments. 



I. CaCl + 6H0, v0l,pf§art '#4''... 1-682 

 II. ... ... ' ' 65-6 ... 1-677 



Mean . . 65'5 ... 1-680 



