American Fisheries Society. 211- 
Germany, the release of the fry being superintended by an official 
representative. The fish are liberated in April when the yolk- 
sac is entirely absorbed, which is about six weeks after hatching. 
The number of such fry planted during the past six years was 
as follows: 
SISSY OSC ses ht 2 70 aay man ere Ford RON Rt Rea 1,750,806 
a ODL eek wr ease MM ig core sete ues eeemite eee: tec 1,959,200 
SN ere an we eae ot Sete Stier eee, ee TO er oars 1,868,900 
GS eee Te te Sar eR: Seti terte Mead Sk es 1,532,500 
SLL eS ree at Tau Hae has ake yet PCOS ahah esse e STS 1,882,000 
WO aoaices Seo et pee oe ee aes 2,417,500 
These plants are in addition to large numbers hatched and re- 
leased at the expense of Germany and Switzerland ; in the former 
country this work has been carried on for at least thirty vears. 
Although only a comparatively short section of the Rhine is 
fin Holland, the salmon fishery there is much more extensive than 
elsewhere. ‘The run of salmon in the Rhine has greatly de- 
creased in recent years, and all the countries concerned are very 
desirous of restoring the supply. Prof. Hoek states that it looks 
as 1f artificial propagation has done no good, but that nobody 
knows how bad the fishing would have become if no artificial 
measures had been instituted. The general puble has no senti- 
ment whatever in regard to the value of fish culture. The salmon 
fishermen are divided into two parties, the one thinking it is 
useless, the other thinking it would do good if practised on a 
much larger seale. 
Prof. Hoek writes as follows regarding the habits of the 
Rhine salmon, which is of the same species as our Atlantic 
salmon : 
You write: “The newly-hatched Atlantic salmon remain in 
the river for two years,” and | found for the Rhine salmon that 
the majority remain in the river for one year only. They pass 
through Holland in the course of May. <A part of them, however. 
remain longer; they are nearly all male fishes and are ripe in 
their second winter. What is very curious is that we never ob- 
served them wandering through Holland; I feel inclined to 
admit that these fishes do not grow old and have given up the 
seaward migration. But this is for the present an hypothesis only. 
