-SEA-FISHERIES LABORATORY. 93 
The propriety of using the factor 6-25 to convert the nitro- 
gen found into proteid is discussed later on. 
Non-volatile mineral matter. 
When there was sufficient of the dried residue, some of this 
was incinerated in porcelain capsules. After about } hour of 
ignition at a low red heat a drop or two of nitric acid was added 
to the cooled residue so as to obtain a white ash. The capsule 
was then again ignited to a full red heat. 
This weighing gave the “ ash”’ of the Tables. It is not 
suggested that it precisely represents the mmeral matters 
present in the raw flesh, but it is probably a near approximation. 
As will be seen from the Tables many of the ei Lia taoe 
samples were examined in full detail. 
The Analytical Results. 
I. Manz Summer Herrings, 1914. 
| 
. oof % of Oil 
Date Sex. Condition. Water. % of Oil. |and Water. 
rr 5:3 a 
- 3-6 ae 
e 27-8 nan 
ag 26-8 ae 
O7°5 24-4 81-9 
ded 29-5 ies 
48-4 32°5 80-9 
46-6 34-9 81-5 
61.2 16-9 78:1 
44-7 26-5 71-2 
53:5 23°7 77-2 
62-3 17-6 79°9 
63-4 16-3 79+7 
60-2 18-1 78:3 
63-9 9-0 72-9 
66-3 8-9 74:2 
