Drift- Weed Kelp from Orkney. 



257 



fft 



Silica, 

 Sand, 



Carbonic acid, 

 VJSif eifcSulphur, 





. 



. 1-765 

 . 1*575 



. 4-580 

 •386 





}ffq Alumint' ° 'T' f b ™ bi ™. fli B ? 7 ' 08 '1425 ' & 

 fiinomawj yd boi&friqiosiq g#w 9£8felo otedg 



Lime 



;nesia, 



T'OI 

 >d-0I 



atedq 



9ffl/ 



£8-S£ 



3-121 



28-1990 



o^-or 

 edc-or 



Carbonate of lime, 2-591 

 Phosphate of lime, 10*556 

 Sulphuret of ealci um, 1-093 

 Silicate of lime, . . 3*824 

 Carbonate of magnesia, 6-554 

 Sand, . . . . ' . 1-575 

 Carbon^ yil&ittohioOS&W 

 Hydrogen, .... -144 

 Nitrogen .... -658 

 Oxygen, . . . . 1-152 

 



29-067 



Lime. 



1-451 



5-376 



•900 



2-050 



... 



... 



Mag- 

 nesia. 





Car- 

 bonic 

 Acid. 



1-14 



... 

 8:121 



... 



... 



3-433 



rforrd \? r 



... 



Phos- 

 phoric 

 Acid. 



1 



::: 



v. 



Silica. 



... 



Sul- 

 phur. 



1,765 oliod 



.... 



Uslth? 

 dXy/f 



The oxygen was obtained by calculating the quantity 

 necessary to form water, which being united to the nitrogen, 

 would not be driven off at 212= F. ^ Qmi [^ 



Analysis of Soluble SaM.™*" «&>&* 

 ►wmock/jD ojrn bofrisvaoo zmi ' egprrjvvf aiboifiarf bar Jtad> 1 R3» 

 Testing Analysis of Soluble Salts. — Those salts which were 



soluble in water were, before proceeding to the quantitative 

 analysis, tested qualitatively. The following are the results. 

 On addition of muriatic acid to the solution of the salts, an 

 effervescence took place, with evolution of carbonic acid and 

 sulphuretted hydrogen. Sulphuric acid produced a dark 

 colour in the solution from the liberation of iodine. This, 

 however, disappeared on heating the liquid, fumes of iodine 

 being evolved. After precipitating the sulphurets by sul- 

 phate of copper, the addition of a small quantity of sulphuric 

 acid made the liquid slightly turbid from the precipitation of 

 sulphur, proving the presence of a small quantity of hyposul- 

 phurous acid. When nitrate of silver was added to a solu- 

 tion of the salts, a black precipitate fell from the formation 

 of sulphuret of silver ; but after a portion of the salts had 



