Show extremely thin shells show lack of material when egg eeg shells are extremely thin either there Is not sufficient material given the birds so that they caa make anbe normal shells or the birds themselves are not sible to make the proper use of tile the material cinatl that Is given them the addition of rod cod liver oil to the ration will help the birds to make better use of the materials that have beets been furnished or a mineral mixture may supply the necessary elements the tha birds need it if birds could get out in tho the direct rays of the sunshine regularly the health giving properties would enable theta thein to make more efficient use of if the feeds and supplements that are given them the practice of keeping layers confined con lined lu in winter prevents this why glass glasa substitutes are used in III some of the windows as these substitutes allow tile the healthful suns rays to pass through when cod liver oll oil Is used it la Is added at tile the we of 1 2 pounds to pounds of the mash red fed or about 1 pints to pounds ot of mil ah |