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the milt of the char were employed. The ova of a hybrid 
between a trout and a char could not be fertilized by means of 
trout milt. Carl Peyrer (1876) stated that in Upper Austria 
“artificial fish culture had produced many cross-breeds, 
especially of the char, Salmo salvelinus, with the trout, which 
excel the pure breed in many respects. In Upper Austria the 
eggs of the char are mostly impregnated with the milt of the 
brook trout.” 
Leuchart remarked that in January, 1878, some salmon ova 
were fertilized with trout milt, and the offspring were 
kept in a private brook well protected from the ingress of 
strange fish. In the beginning of 1879 seventy of them were 
transferred from the water in which they then were, into a 
small perfectly enclosed pond, wherein they remained until 
January, 1880. On taking the fish from the pond only fifty- 
four were found, and a portion of the larger ones had effected 
their sexual development. Only one example was a female, 
while twenty-five milters were counted (possibly the missing 
ones were females which had jumped out of the water at night- 
time and been carried off by vermin). On February 7th the ova 
of the female was milted from one of the males. In the middle 
of March the eyes of the embryo were visible, and shortly 
afterwards the hatched fry, along with their parents, were 
brought to Berlin in spirit. In this instance the male parent 
was a trout, and trout of both sexes commence breeding at two 
years of age, as was here observed to be the case, the import- 
ance of which has been referred to. In the Berlin Fishery 
Exhibition (1880) were some lovely fish, crosses between the 
char and the trout, shown by Professor Haack. 
The Hon. Robert B. Roosevelt observed (Proceedings of the 
American Association for the Advuncement of Science, vol. xxxiii., 
1884) that “ the crosses made under the New York State Fishery 
Commission have been very numerous. The first was that of 
the California salmon, Salmo quinnat, and the brook trout, 
Salmo fontinalis: this was in the year 1876. Then came the 
cross of the salmon or lake trout, Salmo confinis, with the brook 
trout; then the California trout, the Salmo irideus, and the 
