PROPAGATION OF TROUT IN AMERICA. 393 
putting the ova into the breeding-boxes, I have a tin tube that fills the 
neck of the bottle, tapering to about a half-inch circle at the top. This 
tube I place belcw the water in the breeding-box, and gradually empty 
the roe into glass bars. Our breeding boxes are two in number — or 
rather a continuation of one. They are laid quite level, so that the 
water circulates down the one and up the other. The boxes are made 
of wood four inches deep, one foot wide, and the length of the two boxes 
combined is 135 feet. These boxes are supplied with frames inside each, 
three feet long, filled with narrow strips of glass, with the sharp edges 
ground off to prevent cutting the young fish. The glass is laid across 
the stream, forming gutters, in which the ova is placed in rows aeross 
the run of the water ; the glass is supported in the frames three-quarters 
of an inch from the bottom of the box, the water flowing freely both 
above and below the ova. These boxes are capable of hatching at a 
time 15,000 salmon or trout. This season we have 24,000 salmon eggs 
deposited in them, and the eggs are becoming quite visible. In deposit- 
ing the ova in the several boxes, I keep each fish's eggs separate, and 
marked on the boxes 1, 2, 3, &c. I keep corresponding numbers in a 
book, with a remark on each fish's roe at the time of spawning ; and 
during the time of incubation, if I see anything worthy of notice, I take 
a note of the number and what has happened. I pick out all the dead 
ova once or twice a week, and keep account of the number ; and when 
the hatching is finished, I subtract the number of the dead from the 
number deposited, which will show about the quantity we have 
hatched. 
At the present time, the re-stocking of the Tay with trout and 
salmon, and stocking with trout and salmon the Tasmanian waters in 
Australia from ova transported from France and England, are subjects 
of comment by the most learned pisciculturists, proving that fecundated 
ova may be carried in glass bottles all over the globe without injury to 
a single egg. We have just learned that a citizen of Maine has invented 
a process by which he can preserve roe in a condition for being hatched 
for many years. 
Of the various methods of preparing roe for shipment, MM. Gehin 
and Remy place the fecundated spawn in a tin box, between layers of 
pebbles — an undesirable plan, since the shock in transit will certainly 
crush them. Others have recommended alternate strata of wet sand as 
suitable for convenient packing. The plan recommended by Professor 
Ramsbottom, and successfully practised by him for many years, is that 
of placing the ova in large glass bottles filled with river-water, which is 
changed as often as convenient. Mr. Francis Francis, a great ichthy- 
ological student in London, recommends glass bottles similar to those 
used by the French government at present for transporting roe. Of 
course, the fecundated ova can be most safely transported in fall or 
winter. Salmon roe was imported from Ireland last winter by Mr. 
Bowman Johnson of Islip, at the instance of Mr. Ramsbottom, whom he 
