Converting Colour to MonoChrome

I've finally got round to reading my Adobe Photoshop book and, in particular, the section on converting  colour images to black and white. I have to admit that I have always just selected Image>Mode>Greyscale and ended up with a monochrome image. It turns out that I was wrong.

What I should have done, apparently, was select Image>Adjustments>Black and White. So, I though I would follow the author's example and try it out. He also advised - in his first example - to reduce the Red and Yellows and increase the Cyans. Well, I did and these are the result.

Click on the images once and then again to get a really enlarged view.