998 BULLETIN OF THE BUREAU OF FISHERIES. 



SHIPPING CASE FOR FISH EGGS. 

 [Exhibit 7. Fig. 7, pi. cvi.] 



This case is designed for shipping fish eggs either to foreign countries or 

 points at any distance throughout the United States. It can be constructed of 

 any sound lumber li inch thick. The outer case is 2 feet wide, 2 feet high, and 

 3 feet long, with corners halved together to permit of nailing both sides and 

 ends. Its sides are lined with asbestos packing paper, and the bottom with rub- 

 beroid roofing paper. The inner case is made of any light j 2 -inch lumber and is 1 9 

 inches high, 20 inches wide, and 32 inches long. The bottom is made of ordinary 

 galvanized iron and has a slope of 2 inches toward the center to a waste pipe. 

 The outside of this inner case is covered with rubberoid roofing paper. 



Cleats in the ends in the bottom of the outer case support the inner one 

 and make an air space below it, at the same time raising it so that it projects 

 I '^ inches above the upper edge of the outer case. Between the walls of the 

 outer and inner cases is a i-inch air space, and this is closed at the top by means 

 of a strip of lumber 2 inches wide inserted edgewise and flush with the inner 

 wall, making the space airtight. This projection fits into the top of the case 

 when the latter is closed. 



The inside case is divided into five compartments, one at each end and in 

 the middle for ice, the two others for trays, the partitions all flush with the 

 inner case. The ice compartments are 3 inches wide and of the full width 

 and depth of the inner case. The middle compartment is removable. The 

 partitions are made of >^-inch mesh galvanized-wire cloth and are held in place 

 with I -inch cleats nailed upright to the sides of the inner case. These cleats also 

 hold the tray stacks in vertical position, and the space they make allows for air 

 circulation and the dripping of the ice hoppers which are to be placed above. It 

 also allows easy access to the trays and permits of inspecting them at all times 

 without disturbing the ice. 



The case holds 24 trays for eggs, 12 in each compartment. The trays are 

 made of 3^-inch lumber and are 83^ inches wide, i9>]4 inches long, and i inch deep. 

 The bottoms are of fine-mesh wire cloth. Each side of each tray is perforated 

 with five equally spaced '^-inch holes to allow air circulation. 



Over each tray stack, resting upon the ends of the vertical cleats, is an 

 ice hopper loyi inches wide, i9>% inches long, and 2 inches deep, made of ordi- 

 nary galvanized-iron bottom and sides, with wooden ends. The bottoms of 

 the hoppers are perforated near the sides with '^-inch holes to allow the water 

 to escape. Over the lower end of the waste pipe to prevent the cool air from 

 escaping is a bowl-shaped cap which is always filled with water. 



The top of the case, which is hinged, fits tightly over the rabbet formed by 

 the projecting edge of the inner wall, making an air-tight chest. It is provided 



