ABSTRACT OF ENGLISH FISHERIES PATENTS. 27 



upwards, and supported by long narrow tiles indented, to be easily- 

 broken, and provided with projections for holding them up. Over the 

 tiles is placed material to induce the spat or brood of the oyster to ad- 

 here. Provides water-tanks, the temperature and water-supply of which 

 may be regulated and varied (fresh or salt), but the water should be ac- 

 climatized gradually. Has star collectors, formed of wheels on spindles, 

 connected by rollers armed with bunches of bristly substances or hooks. 

 Has also spat collectors, tile perforated and filled with cork. Drawing, 

 Plate Xri. 



Ko. 1316 of 1870.— Bert.— The walls of the inclosure are built of 

 masonry, their foundation below the lowest tides and their heights above 

 that of the highest tides, to prevent loss of eggs. The inner surface is 

 irregular at a height of three feet. The bottom of the basin has a de- 

 clivity toward the center when the trench is formed, in order to drain 

 the water from the basin and su})press the deposits of mud. A torus two 

 inches high is built, perforated at different places to allow the diluted 

 mud-deposits to pass, but prevent the oysters from following. 



A, walls; B, rough inner surfaces; 0, inner walls; E, trenches; G, 

 toruses; F, oysters; I, platforms; J, stone supports for platforms; L, 

 pillars which support cross-pieces and there movable ceiling. PI. XVI. 



Is^o. 4103 of 1874.— Michel.— fi^<>"es for Breeding Oysters.^'FJiBt. 

 Moulds from cement rectangular vessels open at top and having their 

 bottoms provided with numerous holes. 



Second. Forms an open rectangular trough without perforations 

 through its bottom. The ends of this trough project downward, form- 

 ing a stand. 



A pair of these vessels, the lower one perforated, and the upper one 

 placed on it as a cover, form a hive; numbers of which are placed side 

 by side on the beach or on timber sleepers, to form a breeding and rear- 

 ing bed. 



The lower perforated vessels receive the spat, and are kept clean by 

 the wash-water running through them. The upper vessels, besides serv- 

 ing as covers, form nurseries, and protect the oysters against enemies 

 and changes of weather. Drawing, Plate XII. 



No. 3506 of 1875. — De Lagillaraee. — Breeding or Cultivating OyS' 

 ters. — Secures the oysters to a wire and suspends them in the water in a 

 manner that renders them easily accessible for inspection or removal. 

 The oysters thus wired are secured to ti-ellises. The oysters may be 

 placed in cages provided with hooks, said cages being made buoyant 

 and mqored to a submerged chain, held by floats. Drawing, PI. ^\l. 



No. 2470 of 1876.— Jennings and A.kd^^^oi^ .—Propagation of Oys- 

 ters. — Place the oysters and spat in water-tight receptacles made of 

 earthenware or other material and covered over at top. The site upon 



