[Maine-birds] Bar Graph style checklists

I suspect all of you are familiar with the checklist style which uses a
bar of variable thickness across a year to show the approximate
abundance of each species by month. I am trying to discover when this
style was invented and first used for birds. I am aware of two Chester
Reed books from 1912 which uses this style. Does anyone know of any
earlier for any location? I suspect these exist back hundreds of years
for plants but maybe not. Anyone know of uses in the 1800s or earlier?
Thanks.

--
Stan DeOrsey jsmd@att.net

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