Most antique case goods we see (dressers etc.) have side panels made of alternating 1/4" thick boards and 3/4" thick boards with 1/4" grooves cut in them. The 1/4" boards slot into the grooves and by alternating them this way, the panel can be of any length. This was apparently the norm at one time, but I guess it went by the wayside when plywood came along. Anyway what was that technique called?