...He worked some levers and the roofof the barn folded back, leaving theway clear for the departure of thehuge projectile... 
Various 「Astounding Stories of Super-Science February 1930」
...A loud hum filled the air, andsuddenly the projectile rose and flewout through the open roof, gainingspeed rapidly until it was a mere speckin the sky...
Various 「Astounding Stories of Super-Science February 1930」
..."I can pack the explosive in the projectile, all right," Dixonanswered grimly...
Various 「Astounding Stories, May, 1931」
..."The mechanism inside the projectile is turned off now, of course,"Ruth said...
Various 「Astounding Stories, May, 1931」
..."If it were turned on, the projectile would have been onits way to the space ship long ago, for the radio waves are as stronghere as at the Centaurians' camp...
Various 「Astounding Stories, May, 1931」
...The girl pointed to a small metal stud in the nose of the projectile...
Various 「Astounding Stories, May, 1931」
...Even as he startedtoward the projectile, he staggered and fell...
Various 「Astounding Stories, May, 1931」
...One last sprawling convulsive effort—and Dixon had the projectile inhis hands...
Various 「Astounding Stories, May, 1931」
...Then that slackened, and Sykes andMcGuire clung to each other for supportwhile the car that had been shotlike a projectile came to rest...
Various 「Astounding Stories of Super-Science, December 1930」
...The one who drove that projectile in its shrieking flight hadtouched another control that Rawson had not before seen...
Charles Willard Diffin 「Two Thousand Miles Below」
...Kreynborg was using a pocket-gun, one of those small terribleweapons which shoot a projectile barely larger than the graphite of alead pencil, but loaded with a fraction of a milligram of hexynitrate...
William Fitzgerald Jenkins 「Invasion」
...There was a delicatesteering sight on Danny's ship; he could direct the red craft as if itwere in very fact a projectile that could be controlled in flight...
Charles Willard Diffin 「The Hammer of Thor」
...It showed like a great gray projectile coming in level with us...
Raymond King Cummings 「The White Invaders」
...We cannot indeed show thecannon, but we can point to a great projectile...
Robert Stawell Ball 「The Story of the Heavens」
...A velocity of 5 miles a second could carry a projectile right round theearth...
Oliver Lodge 「Pioneers of Science」
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