Ah, to carry a chalk board in my back pack again. The problem, Dan, is that  
it is hard to clean off the chalk board out in the field and after a while the 
 old lettering blurs with the new. Moreover, all it takes is a little  
carelessness or a turn of the board in the sunlight to blur or obscure any  message 
on the board. White letters on a black background will always be  visible. Of 
course, carrying a box of letters and the board may not be practical  in 
110-degree heat, especially when you just never can find the letter "S" and  have 
to sort through all the dang letters with sweat draining all over the  place. 
Perhaps a lens cap or a jackknife is better for field survey and the menu  
board is better for test and major excavation work, eh?
 
Ron May
Legacy 106, Inc.



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