The crystal planetoids

In Short

This is a fast-paced pulp science fiction adventure featuring a trio of researchers whose laboratory work accidentally exposes an alien invasion. As the atmosphere thickens and the world faces ecological collapse, the protagonists—Ronald Gates, Eleanor Firth, and the jealous Philip Dunbar—find themselves caught between human betrayal and a race of octopus-like, tentacled extraterrestrials. It remains a classic example of early twentieth-century speculative fiction, defined by its blend of high-stakes tension, inventive pseudo-science, and a narrative urgency that prioritizes constant forward momentum over complex character development.

The Story

The narrative begins at the Merlin Research Institute, where Ronald Gates perfects an "Infra-Red Eye," a device capable of seeing what the human eye cannot. When he and his colleagues, Eleanor Firth and Philip Dunbar, turn the device toward the sky, they discover a terrifying sight: massive, spidery webs suspended in the atmosphere, inhabited by towering, octopus-limbed monsters. These Saturnian invaders have begun altering Earth’s climate, thickening the air and raising temperatures to make the planet habitable for their own needs.

The monsters swiftly capture the three scientists. Red-Hood, the autocratic leader of the Saturnians, reveals that his people require human-provided compressed air to survive in Earth’s thin atmosphere. They demand that the humans cooperate, using their scientific knowledge to build air-supply systems. Dunbar, motivated by self-preservation and a petty rivalry with Gates, immediately turns traitor. He pledges his loyalty to the invaders, hoping to be spared while the rest of humanity faces extinction. Eleanor is kept as a hostage to ensure Dunbar's compliance.

Gates, however, refuses to yield. He experiences the horror of being held captive on a floating web-platform, witnessing the Saturnians' plans to collect humans as biological specimens for a "Museum of Unnatural History." During a Saturnian festival, the invaders fall into a drug-induced stupor after consuming a substance called Kishkash. Seizing this opportunity, Gates steals a powder that renders him invisible. He escapes back to Earth, though he finds himself in the tragic position of being unable to communicate with his fellow humans, who mistake his invisible presence for the alien threat itself.

Meanwhile, Eleanor manages to escape Dunbar’s control. Utilizing her own scientific ingenuity, she constructs an "Electronic Space Ray," a powerful machine designed to shred the Saturnian webs and dissolve the invaders. As the atmosphere reaches a breaking point, Gates, still invisible and armed with an electric blade, infiltrates the Saturnians' remaining strongholds. Simultaneously, Eleanor fires her machine from the laboratory. The combined efforts of the two scientists break the alien influence. The webs are destroyed, the climate begins to normalize, and the remaining Saturnians are driven from the planet. The story concludes with the reunion of Ronald and Eleanor, who watch the skies finally clear of the invaders, leaving the Earth safe once more.

How It Unfolds

The discovery Ronald Gates unveils his Infra-Red Eye, revealing the hidden, web-bound monsters looming over the city. The trio’s initial shock is interrupted by the creatures, who quickly descend to snatch them from the rooftop.

The captive dilemma Held high above the ground on swaying platforms, the humans are interrogated by the Saturnian leader, Red-Hood. Dunbar chooses to betray his peers to save his own life, while Eleanor becomes a hostage to keep him working.

The daring escape During a Saturnian holiday, the monsters succumb to an intoxicating substance, allowing Gates to pilfer a powder that grants him invisibility. He descends to Earth, struggling to navigate a world that cannot see him and fears his presence.

The counter-attack Eleanor finds a way to build a weapon against the invaders while trapped in the laboratory. She constructs an Electronic Space Ray to target the planetoids and dissolve the alien technology.

The final confrontation Gates, using his invisibility and a makeshift electric blade, sabotages the monsters from within their ranks. Eleanor fires her apparatus, successfully clearing the sky and forcing the Saturnians into a final, chaotic retreat.

The People

Ronald Gates is the classic earnest inventor, driven by scientific curiosity and his affection for Eleanor. His arc is defined by his transition from a naive researcher to a desperate, solitary guerilla fighter who must survive while effectively being a ghost to his own kind.

Eleanor Firth provides the story's emotional and intellectual pivot point. While initially cast in the role of the observant colleague, she proves to be the most resilient of the three. Her decision to stop waiting for rescue and instead build the very technology that saves the world marks her as the true strategist of the group.

Philip Dunbar is the cynical foil to Gates. His character is defined by a "saturnine" resentment and a willingness to facilitate genocide to secure his own safety. He views the invasion not as a tragedy, but as an opportunity to distinguish himself—or at least to survive the collapse of his peers. He never finds redemption, serving instead as a bleak reminder of how easily human selfishness can align with existential threats.

In Its Own Voice

Describing the initial, chilling sight of the invaders, the narrator captures the sudden transition from mundane lab work to cosmic horror:

There in the sky was a vast web and perched on it were invisible beings--what did it all mean?

Later, as Gates realizes the true, gruesome intent of the Saturnians, he confronts the cold reality of his species’ expendability:

"Naturally, we want specimens of all the human fauna, of every race and color, so that we may skin and dry them in the interest of science, and bring them back to Saturn as specimens for the Museum of Unnatural History."

What It's Really About

At its core, this book examines the fragility of human civilization when confronted with an intelligence that views humanity not as an equal, but as an object. The Saturnians’ desire to catalog humans in a "Museum of Unnatural History" is a biting critique of scientific arrogance and the dehumanization that often accompanies the pursuit of "progress." There is also an underlying tension regarding the betrayal of one’s own kind. The story suggests that the greatest threat during an apocalypse is not merely the external enemy, but the "Quisling" who aids the conqueror for personal gain. Ultimately, the book argues that humanity’s salvation rests not on the strength of its armies, but on the intellectual resolve of individuals who refuse to accept subjugation.

Why Read It Today

Readers who enjoy the frantic, high-concept energy of 1940s pulp magazines will find this a quintessential specimen of the era. It moves at a breakneck speed, prioritizing "wondrous" science and immediate peril over long, contemplative pauses. The experience of reading it feels like watching an old serial film—there is a genuine sense of dread in the descriptions of the "thickening" atmosphere and the invisible, omnipresent threat.

However, readers should be prepared for the period-specific limitations of the text. The characters are largely archetypes, and the dialogue often leans into melodramatic exclamations—"By glory!" is a recurring refrain that may strike modern readers as quaint or distracting. Furthermore, the attitudes toward gender—particularly the way Dunbar manipulates Eleanor and the way she is initially dismissed as a "dame"—reflect the mid-century social norms of the publication date. If you can appreciate the work as a product of its time—a vivid, fast-moving adventure that doesn't shy away from dark concepts like extinction and colonial-style exploitation—it offers a unique, breathless glimpse into the roots of modern disaster science fiction. It remains a quick, gripping read for those interested in the evolution of the "invasion" subgenre.