ANALYSIS OP THE ROE OF PISHES. g'^'JT 



terniittent. After this calcination the phosphorus is acidi- 

 fied, and may be dissolved in water. 



Desirous of removing any doubt, that might arise respect- Ths phospho- 

 ins: the state of the phosphorus in the coal of roe, the au- '"^ '" ^^^^ ^°^l 



1 • • • 1 rrti • T 1 1 "°* owing to 



thors lixiviated this coal with muriatic acid. This dissolved thedecompo- 



the phosphates of lime and magnesia; and the residuum, ^'^'"" °f ^"y 



..11 -Til phosphate. 



calcined afreoh, exhibited the same phenomena as it did be- 

 fore it was thus treated. The phosphorus of the coal of roe, 

 therefore, is not owing to the decomposition of these phos- 

 phates. 



The affinity of carbon for phosphorus appears to be very Carbon lias a 



great ; for'the same coal, being calcined four times, yielded strong affinity 



,,..,, ^- - for phospho- 



phosphonc acid each time. ^^^^ 



Beside the phosphates of liine and magnesia, which the Phosphate of 



coal of roe retains, we find also phosphate of soda and of ^^'^^ ^""^ °^ 



, , . , 1 J- 1 J • . I • • potash, 



potash, vvhicn may be dissolved in water. It contams ni- and nitrogen. 



trogen too ; for when it is calcined with potash we obtain 

 prussiate, 



4. The coal of fibrin, subjected to the sam-e experiments Coal of fibrin. 

 as that of roe, does not exhibit the same phenomena. The 

 water with which this coal was washed was perceptibly alka- 

 line; vvhich shows, that the aciditiable property observed in 

 the coal of calcined roe does not belong to all animal coal ; 

 and there is even reason to believe, that it is peculiar to this 

 5>ubstance. 



Sect. IV. Roe treated ivith water and lait/i alcohol. 



1. Roe triturated with distilled water, and reduced to a Roe treated 

 pulp, imported to it no signs of acid or alkali. Its soft ^^'^'^ ^^'"^'^" 

 and white part is diffusible in water, and gives it the ap- 

 pearance of an emulsion ; the membraneous matter how- 

 ever is perceptible in it, and camiot be separated; and when 

 filtered, it is still turbid. 



2. If we boil the water in which roe lias been diffused, Contains albu- 

 there is one portion which coagulates like albumen ; but the ™'^" ^'^^ ^"^'^ 

 water retains in solution a matter analogous to gelatine, for 



it becomes a jelly by boiling down. 



3. This jelly; being burned and calcined, exhibited no phos- jelly. 



phorescence. 



