192 
Part Illi — Tenth Annual Report 
ponds communicating with the sea, and supplied in addition with a suc- 
cession of certain invertebrates, which may be retained in separate com- 
partments, and whose spawn or larvae form a natural food to the fishes in 
their early stages. 
In regard to the kinds of sea-fish for pisciculture, it may be said that 
hitherto operations on any large scale have been almost confined to the 
cod. Dannevig, however, has experimented also with the flounder, the 
herring, and with other species. It appears to me that in this matter 
we should be guided by the results of statistical inquiry as to what 
fisheries are on the down-grade, and what the most valuable fisheries are 
that may be succoured. From the preceding pages I think it is clear 
that in this country, and especially on the East Coast, the fisheries which 
at present stand most in need of replenishment by sea-fish culture are 
those for the valuable flat-fishes — turbot, halibut, brill, sole, lemon sole, 
and plaice ; and a reference to my paper relating to the spawning of these 
fishes (p. 233) will show that several of them could be treated in succes- 
sion in the same establishment. 
The Board's Sea-Fish Hatchery at Dunbar. 
The Fishery Board had the subject of sea-fish culture under special 
consideration last year, and instructed me to visit and inspect Captain 
Dannevig's Sea-Fish Hatchery at Arendal, in order to see how a similar 
system might be adopted at Dunbar. Subsequently, on the invitation 
of the Board, Captain Dunnevig kindly came over to Scotland and 
examined the site of the proposed hatchery and sea-creeks adjacent, and 
having reported favourably, it was decided to erect a sea-fish hatchery 
at Dunbar on the model of the one in Norway. The essential require- 
ments were (1) the erection of a hatching-house, with hatching appa- 
ratus j (2) the construction of a large spawning tank for the supply of 
the ova; (3) a suitable boiler, engines, pumps, and piping for supply- 
ing sea- water ; and (4) the formation of a sea-water enclosure in which 
the adult fish could be collected and the fry reared. All these have 
now been provided, with the exception of the sea-water enclosure. The 
hatching-house and hatching boxes were made in Norway under the 
supervision of Captain Dannevig; the spawning tank has been con- 
structed from plans prepared by Messrs Strain, Robertson, & Thomson, 
C.E.,, and the boiler and pumps were selected by Sir James Maitland 
and myself. The ground upon which the hatchery and its adjuncts 
have been erected belongs to the War Office and to the burgh of Dunbar, 
the use of which has been granted for the purpose. 
The hatching-house (PI. iv. A.) is a substantial double-walled wooden 
building, 35 feet long, 24 feet broad, and 18 feet high, standing on a 
foundation of brick and concrete, and it is so placed that it may be 
greatly extended in area later. The floor space at present permits of 
sixteen of Dannevig's hatching-boxes being employed, capable of contain- 
ing at one time 80,000,000 fish ova, and this will allow of more than 
double that number to be manipulated during the spawning season of 
any one species, and many times that quantity if fish with different 
spawning times are employed. 
The spawning tank (fig. B.) is constructed of concrete sunk in the 
ground, the walls varying in thickness from 4 feet to 2 feet. It is 40 feet 
long by 11 feet 6 inches deep, the breadth at one end being 26 feet and 
at the other 18 feet; and it is capable of containing 60,750 gallons of 
