iB 
eg BIOLOGY OF THE RHINE SALMON. 443 
TABLE VII.—Decrease of the quantity of dry substance and albumen, §c.—Continued. 
2. Contents of the 
Be side-nuscle. 
: os = 
b HO H an 
3 Ay = Suu 
om Bes “3 a 
iS) NEG a 2 ae 
a = Bis sa. | 38 
Eo ic} “aE 5 = ge 
g a BS | = Ee 
fs E 5 < A 
Milli- ; 
‘meters. | Grams. | | 
Empty, }| 
Dec. 8, 1876 5, 530 joven. nik 13.5 | 19.3 
iTS. | 
Nov. 3, 1879 7,740 | 26.87 | 13.6 | 19.8 
4, 187 9,620} 1890 | 15.2 | 21.4 
8,900} 19.21 | 13.0 18.3 
7,650 | 26.72 | 13.4 18.4 
7,290 |*Empty..| 13.4 20. 2 
5,805 § ior 127 16.8 
SFT 5 fn aed CE go |) Empty,?| | 
....| 846 4,900 15 gra 10 | 141 
Average of the salmon of November and December......-...-..-----------------0---- | 1352 18.5 
Considering all the circumstances, viz: (1) the positive decrease in 
the weight of the flesh, and (2.) the decrease of the remaining flesh of 
the body by 4.3 per cent. of its contents of albumen, we find, from a 
comparison with the composition of the ovarium, that the loss of albumen 
Srom the side-muscle ts sufficient to meet the entire consumption of albumen 
by the last four-fifths of the growing ovarium. 
In order to determine this matter more accurately, the weight of the 
side-muscle of two fish of average sizet was ascertained, its substance 
analyzed, and the decrease of its albuminous matter compared with the 
increase of albumen in the ovarium. 
Of these two fish the second may certainly be considered as an abso- 
lutely normal fish, weighing 8,930 grams. It had almost the average 
weight (8,926), and, measuring 878 millimeters, it had the average length 
of the group to which it would have been assigned according to Table LV, 
if it had been weighed and measured on the same day of the year 1878. 
This coincidence, though intended, had been reached only by an accident. 
The head, vertebral column, the bones of the shoulder, and the ven- 
tral fins of this fish were prepared, and freed from all the portions of 
the side-muscle attached to them, whilst the other muscles were left. 
To this must be added the heart, liver, spleen, and kidneys (according 
to the determination of another and very similar fish), The surface of 
the skin, apart from that adhering to the head, tail, and fins, was care- 
* The empty females had yielded their eggs a few days previous, for piscicultural 
purposes. 
tFor these and other experiments Mr. Schneider-Wirz, dealer in table luxuries, has 
very kindly furnished the fish during those seasons when Mr. Glaser only sold fish 
at wholesale. 
