just to clarify Chris........... my comments weren't intended as a blanket criticism of the book, but rather a complaint that the reproduction of the drawings of the factory patterns are much smaller than I would like to have seen. Doubtless there was a good reason for this - probably that the book might have doubled in size had the author increased the scale of the drawings.
Nonetheless I wouldn't want to be without the book - I'm not aware of anything else comparable - and as far as the drawings go not helped by the fact that I have floaters on one eye which has the effect of slightly blurring images when concentrating for too long.

Are your salts identical to Christine's?