ABSTRACT OF ENGLISH FISHERIES PATENTS. 29 



Tlie spawn or spat, iu rising in the apparatus will traverse layers of 

 collectors, and tlie water in retiring will filter through the layers of 

 broken shells and deposit thereon the spat which it holds in suspen- 

 sion. The apparatus can be inspected daily and the hive withdrawn 

 when sufficiently filled and replaced by a fresh hive. A series of aj)- 

 paratus may be supplied through one filter. ISTo drawing. 



OYSTER DREDGES. 



No. 2906 of 1860. — Ennis. — An open-mouth cage so formed and fitted 

 that when lowered into the water and drawn over the beds it will first 

 disturb and then gather up the oysters. 



Fitted to and extending across the mouth of the case, are two scrap- 

 ers, set parallel to each other and on opposite sides of the cage. In 

 front is a rake held iu i)osition by binding-screws forming a double rake. 

 The drag-iron having an eye is secured to the sides of the cage, and to 

 the eye the rope is attached for hauling the dredge. Drawing, Plate 



No. 323 of 1869. — Brabason. — The links of the dredge are runners 

 like those of a snow-sleigh, turned up at the ends and connected by an 

 iron ring or link which rests on them and presents a smooth under sur- 

 face which carries it along the bottom of the sea, passing over the spat 

 or brood of oysters without injury to them. Pro\isional specification. 

 No drawing. 



OYSTER RAKES AND TONGS. 



No. 2171 of 1866. — Johnson. — Two converging rakes are provided 

 with handles united by a rivet, one handle being provided with a spring 

 which pulls upon the upper end of the other. The rakes are held open 

 by a lever having its fulcrum on the projecting end of one of the 

 handles, one end of the lever taking into a catch upon the other handle 

 and a lowering rope or chain being attached to the opposite end of the 

 lever. The weight of the apparatus will cause the catch to hold as the 

 apparatus is lowered while open. When the apparatus rests upon the 

 bottom, the weight being relieved, the lever unlatches and the rakes 

 are drawn together by the spring. Pulling upon the rope then also 

 draws the rakes together. The teeth are removable. Guards at both 

 the ends and back of the rakes prevent anything falling out. Drawing, 

 Plate XIII. 



No. 1438 of 1867. — Johnson. — Two rakes with scoop-shaped or open 

 heads, each attached to a handle and the handles connected by a joint, 

 near the middle, the rake teeth coming toward each other. Drawing, 

 Plate XIY. 



ELECTRICITY, PARALYZING FISH, &C. 



No. 2644 of 1863.— Baggs.— Wires or hooks and lines, nets, &g., con- 

 nected to a galvanic battery. The fish receiving an immediate shock is 

 paralyzed or killed. Drawing, Plate XV. 



