> At one point in my application I will be referencing the Class name
> dynamically, I will have it in a String.  So e.g. class = "Person".  I
> want to send the Person class the 'find' message (call Person.find).

Maybe like:

[taq@~]irb
 >> class Person; def self.say_hi; puts "hi"; end; end
=> nil
 >> s = "Person"
=> "Person"
 >> Object.const_get(s).say_hi
hi
=> nil
 >> Object.const_get(s).send(:say_hi)
hi
=> nil