RE: Dichotomus key "how to" - Dykes question

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I can find the plates from Dyke's book on line, but I have not been able to find the text.  Do you have a link to the whole thing?  I have a copy of the book, but a PDF version would be nice to be able to look at when at work or travelling as well.

And to the dichotomous key thing.  There are two very different version of dichotomous keys, and it might be good to reference both or to choose which is prefered.  One is the "couplet" type, where each contrasted pair (or triplet) is together and each part refers to another couplet.  The other type is where the pairs are separated (each one heading up the entries it leads to) and subsequent entries are usually indented.  In my opinion the second type is confusing, difficult to use, and drives me crazy trying to sort through and find the "other" option (especially if the key is long).  The 'Pictured Key Nature Series' (How to Know) books are great examples of the first ! type, and many bulky regional floras have used the second type.  I don't remember which type Dykes used (and don't have the book here in front of me - a good example of why an "on-line" version would be nice).
 
Examples  (hope the formatting holds, because in the indented example, it is all that keeps it useful):
 
couplet type
1a - flowers blue..... [go to] 2
1b - flowers yellow..... 10
 
2a - flowers rotate..... 3
2b - flowers zygomorphic..... 5
 
3a - @#$)(  .... species A
3b - not as above .... 4
 
and so on
 
indented type
 
1a - insert description here
       2a ......
               3a ............
                     &nbs! p;    4a species A
   !                        4b species B
       2b ..........
                3b ...........
                          4a species C
                          4b species D
1b - alternate choice to 1a goes here
        2a ............
                3a ............
           &n! bsp;               4a ...............
                                         5a species E
                                         5b species F
                           4b
        2b ..........
            &nbs! p;     3b ...........
&! nbsp;                          4a species G
                           4b species H
 
and so on (sometimes the sequence of numbering is different, but the indenting is always what keeps things straight)
 
These can go on for dozens or potentially hundreds of numbers
 
Thanks,
Dave Ferguso