The body obtains vitamin A in two ways. One is by manufacturing it from carotene, a vitamin precursor found in such vegetables as carrots, broccoli, squash, spinach, kale, and sweet potatoes. The other is by absorbing ready-made vitamin A from plant-eating organisms.
It takes a really good glue to hold picture frames together. The common glues that you see in hardware stores just don't cut it. Picture frames glued up with these glues will snap apart very easily. Because these picture frame clamps are not professional vises, it is even more important to use a really good glue.
The bottom tear-off lens of the stack includes adhesive for removably securing the tear-off lens stack to the main goggle lens. The tearable lenses of the invention are of a desired shape, usually configured to generally correspond to the shape of the permanent goggle lens. The stack of tear-off lenses comprises a plurality of adhesively bonded transparent plastic sheets which have adhesive at the upper and lower peripheral portions thereof.