"My God, man!" he said finally. "Doesn't it hurt?"

"It's a little like being boiled in oil," replied Thorn grimly. "Outside of that it's all right. Hurry, before the stuff gets too cool."

* * * * *

The clinging thin shell covered him to his chest, then to his throat. At that point he reached into a drawer in a workbench beside him and drew out two small, hollow hemispheres of glass. These he cupped over his eyes.

"What are those for?" asked the Secretary.

"So my eyes can be covered with the film. If they weren't, I'd present the somewhat remarkable spectacle of a pair of disembodied eyes walking down the street."

Painfully, agonizingly, the hot film was applied to throat and face; over the glass spheres that cupped around the eyes; over a tight leather cap covering the scientist's hair; and over a sort of football nose-guard which extended down an inch below the end of Thorn's nose in a sort of overhanging offset that would allow him to breathe and still keep his nostrils hidden. The Secretary stepped back.

Before him stood a figure that looked not unlike a glazed statue of a man. The effect was that of a body encased in clear ice--and like clear ice, the encasing shell sparkled and glittered radiantly in the sunlight that poured in at the windows.

Thorn moved. His glazed arms and legs and torso glistened with all the colors in the spectrum; while under the filmed bulges of glass his eyes looked as large as apples. The Secretary felt a chill of superstitious fear as he gazed at that weird and glittering figure with its enormous glazed eyes.

"But you aren't invisible," he said at length.

"That comes now," said Thorn, walking ahead of the Secretary while on the ceiling above him danced red and yellow and blue rainbows of refracted light.

* * * * *

He stepped onto a big metal plate. Suspended above was a huge metal ring, with its hole directly over the spot on which he stood.

"Soft magnets," explained Thorn. "As simply as I can put it, my process for rendering an object invisible is this: I place the object, coated with the film, on this plate. Then I start in motion the overhead ring, creating an immensely powerful, rapidly rotating magnetic field. The rotating field rearranges the atoms of this peculiarly susceptible film of mine so that they will transmit light rays with the least possible resistance. It combs the atoms into straight lines, you might say. With that straight-line, least-resistance arrangement comes invisibility."

"I don't quite see--" began the Secretary.

"Refraction of light," said Thorn hurriedly. "The light rays strike this film, hurtle around the object, it coats--at increased speed, probably, but there are no instruments accurate enough to check that--and emerge on the other side. Thus, you can look at a body so filmed, and not see it: your gaze travels _around_ it and rests on objects in a straight line behind it. But you'll see for yourself in a moment. Pull that switch, there, will you?