Living cells were different. There, within a small area, reactions were carried out that provided energy, growth, and movement. There was no separation, and man could not duplicate this any more than a man could prepare a complete dinner from appetizers to dessert by mixing together the ingredients for everything into a single large dish, cooking it, and hoping to separate the apple pie from the cheese dip later on.

Cells could keep the hundreds of separate reactions straight, using enzymes. Each enzyme was like a single worker in a kitchen, doing just one thing. Thus a baker could not make a steak, any more than a steak griller could use his equipment to prepare appetizers.

But enzymes had a further use. They made possible chemical reactions that otherwise would not occur. A biochemist could duplicate the reactions by using great heat, or great pressure, or strong acids. But the human body, or the individual cell, could not tolerate such extremes of environment. Enzymes, the matchmakers of life, helped chemical reactions to go forward at body temperature and atmospheric pressure.

Enzymes were essential to life on earth. But if another form of life had learned to do without them, it must have evolved in a wholly different way.

Therefore, they were dealing with an entirely alien organism.

And this in turn meant that analysis and neutralization would take much, much longer.

In the room marked MORPHOLOGY, Jeremy Stone removed the small plastic capsule in which the green fleck had been imbedded. He set the now-hard capsule into a vise, fixing it firmly, and then took a dental drill to it, shaving away the plastic until he exposed bare green material.

This was a delicate process, requiring many minutes of concentrated work. At the end of that time, he had shaved the plastic in such a way that he had a pyramid of plastic, with the green fleck at the peak of the pyramid.

He unscrewed the vise and lifted the plastic out. He took it to the microtome, a knife with a revolving blade that cut very thin slices of plastic and imbedded green tissue. These slices were round; they fell from the plastic block into a dish of water. The thickness of the slice could be measured by looking the light as it reflected off the slices—if the light was faint silver, the slice was too thick. If, on the other hand, it was a rainbow of colors, then it was the right thickness, just a few molecules in depth.

That was how thick they wanted a slice of tissue to be for the electron microscope.

When Stone had a suitable piece of tissue, he lifted it carefully with forceps and set it onto a small round copper grid. This in turn was inserted into a metal button. Finally, the button was set into the electron microscope, and the microscope sealed shut.

The electron microscope used by Wildfire was the BVJ model JJ-42. It was a high-intensity model with an image resolution attachment. In principle, the electron microscope was simple enough: it worked exactly like a light microscope, but instead of focusing light rays, it focused an electron beam. Light is focused by lenses of curved glass. Electrons are focused by magnetic fields.