accomplished by M. Coumes, the engineer of this department of the Rhine, who, in conjunction with Professor Coste, planned the buildings at Huningue; indeed the machinery of all kinds is as nearly as possible perfect. [Illustration: HALL OF INCUBATION.] [Illustration: BASINS FOR THE YOUNG FISH.] [Illustration: GUTTERS FOR HATCHING PURPOSES.] The course of business at Huningue is as follows:—The eggs are brought chiefly from Switzerland and Germany, and embrace those of the various kinds of trout, the Danube and Rhine salmon, and the tender ombre chevalier. People are appointed to capture gravid fish of these various kinds, and having done so to communicate with the authorities at Huningue, who at once send an expert to deprive the fishes of their spawn and bring it to the breeding or store boxes, where it is carefully tended and daily watched till it is ready to be despatched to some district in want of it. The mode of artificial spawning is as follows, and I will suppose the subject operated upon to be a salmon:—Well, first catch your fish; and here I may state that male salmon are a great deal scarcer than female ones, but fortunately one of the former will milt two or even three of the latter, so that the scarcity is not so much felt as it might otherwise be. The fish, then, having been caught, it should be seen, before operating, that the spawn is perfectly matured, and that being the case, the salmon should be held in a large tub, well buried in the water it contains, while the hand is gently passed along its abdomen, when, if the ova be ripe, the eggs will flow out like so many peas. The eggs must be carefully roused or washed, and the water should then be poured off. The male salmon may be then handled in a similar way, the contact of the milt immediately changing the eggs into a brilliant pink colour. After being again washed, the eggs may be ladled out into the breeding-boxes, and safely left to come to maturity in due season. Very great care is necessary in handling the ova. The eggs distributed from Huningue are all carefully examined on their arrival, when the bad ones are thrown out, and those that are good are counted and entered upon the records of the establishment, which are carefully kept. The usual way of ascertaining the quantity is by means of a little stamped measure, which varies according to the particular fish-eggs to be counted. The ova are watched with great care so long as they remain in the boxes at Huningue, and any dust is removed by means of a fine camel-hair brush, and from day to day all the eggs that become addled are removed. The applications to the authorities at Huningue for eggs, both from individuals and associations, are always a great deal more numerous than can be supplied; and before second applications from the same people can be entertained, it is necessary for them to give a detailed account of how their former efforts succeeded. The eggs, when sent