444 Introduction of Salmon 
agree that two spawn-tubs would have been advisable ; 
namely, one for the breeding and the other for the brood, 
whereby a greater scope would be obtained for the brood, 
and a greater facility for the removing of any that might 
perchance die. 
8rd. The quantity of spawn was not ereouarlsa in excess, 
if at all, as I have kept double the quantity of brood alive 
for many months perfectly healthy in less space than one- 
half of the spawn-tub, merely delivering to them a plentiful 
supply of pure water; by which arrangement they remained 
stunted in growth, until I turned them into water with a 
regular supply of food. 
4th. The Columbus made a protracted voyage of 136 days’ 
duration to Hobart Town; so that, had the brood arrived 
safe, it being then late in the season, the winter floods might 
have caused some mischief to them—but not to the extent 
believed, as it is not the brood that the fresh or new water 
affects so extensively in the fisheries, but the spawn beds, 
from the earthy deposits brought down by the floods. The 
period of the year best suited for the transmission of the 
salmon spawn from’ England to Van Diemen’s Land is 
October, when, from the usual run of a sailing vessel, it 
might be expected that it or the brood would arrive out in 
the summer months of those regions. An arrangement to 
that effect was entertained in 1851, at that period of the 
year, but from circumstances became deferred, and the 
experiment was not carried out until January 1852, as pre- 
viously detailed. As regards Mr. J. L. Burnett's views of 
sending out smolts, I fear that they would meet with the 
same fate, under the equator, as those bred out on board 
the Columbus, and from the same cause, viz., the great 
heat of the tropics affecting decomposition of the water so 
