10(3 



Part III. — Twenty-fourth Annual Report 



paper the numbers given for " proteid " refer simply to the total nitrogeu 

 calculated as proteid by multiplying the amount of the former by 6*25. 



In the case of these herrings a weighed quantity of fresh muscle was 

 mixed up thoroughly with anhydrous sodium sulphate, the mixture boiled 

 with alcohol to coagulate the proteid, and then the powder extracted 

 frequently with boiling distilled water until all the sulphate was removed. 

 The remainder, consisting- of coagulated proteid, was incinerated in the 

 usual way with sulphuric acid (Kjeldahl) and the nitrogen estimated. 

 On multiplying the latter by the usual factor the amount of coagulable 

 proteid was obtained. 



(a) Amounts stated in percentages of fresh material. 

 Series A.-- 



Coagulable 



Water. Proteid. Proteid. Fat. 



70-81 20-67 18-71 5-34 



Series B. — 



67-58 19-95 16-13 9'57 



(b) Grammes in total muscles of fish. 



Coagulable 



Proteid. Proteid. Fat. 



Series A. . . 19-42 17 58 5-01 



,, B. . . 12-56 10-16 6-02 



June 2, 1906 (Loch Fyne). 



These herrings were large spent fish with young ova in the ovaries. 

 Females were selected for analysis. 



Length. 



Girth. 



Weight. 



Genitals. 



Cm. 



Cm. 



Gm. 





29 



14 



211 



Weight of ovaries 



28 



13 



180 



of these sixfish , 



27 



13 



170 



10-7gm. 



26 



13 



165 



26 



13 



150 





26 



12 



138 





Avg. 27cm. 



13cm. 



169gm. 





Analyze* : — 



(a) In percentages of fresh material. 



Water. Proteid. Fat. 



72-35 17-81 9 11 



(b) Grammes in total muscles of fish. 



Proteid. Fat. 

 30-09 15-39 



June 2, 1906 (Loch Fyne). 



Fourteen young immature herrings were obtained on the same day as 

 the spent fish of the preceding series. 



