A Flash-Light Egg-Candling Device
A pocket electric flash light can be easily used for testing eggs if equipped in the following manner: Take an ordinary tin funnel and cut off the spout so the small end will fit snugly over the lens of the flash light. Prepare the larger end of the funnel to accommodate a tin-can cover, so the cover will fit tight. Cut out the face of the cover, leaving a ¹⁄₂-in. rim all around, and file the edge. Then cut a 1-in. hole in a piece of felt, place it over the large end of the funnel, and force the cover over it. This may be quickly slipped on and off the flash light and carried in the pocket. The egg to be tested is placed on the felt, over the opening, and the lamp held vertically, the operator looking down on the egg.