Biologists describe this phenomenon using the hourglass model: Like the sand that flows from bulb to bulb, the development of ...

28.5 x 32 x 32 in. (72.4 x 81.3 x 81.3 cm.) the octagonal crema marfil marble top above a conforming top, over a silver-gilt hourglass-form base with horizontal reeding. New Orleans Auction Galleries ...