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Syringe image
Pattern type Converter
Number of cells 66
Bounding box 24×34
Discovered by Tanner Jacobi
Year of discovery 2015

Syringe[1] is a glider-to-Herschel converter composed of an eater 1, a block, a beehive with tail, and a large welded still life that combines an eater 2 and an unnamed glider eater. It works by converting a bait block into a pi, then hassling the pi into a B-heptomino that restores the bait block over the course of its evolution. Its repeat time is 78, but it can also "overclock" to function with glider streams of period 74 or 75. The syringe allows much more compactness and timing versatility in signal circuitry than Herschel conduits alone, and in combination with the snark, it can largely replace very long Herschel tracks (if they are not required to be spartan) by simply passing a glider from somewhere near the start to somewhere near the destination. This works similarly to Herschel transmitters and receivers, but in more flexible way.

Within 3 days of the syringe's discovery, over half of all known guns from periods 14 to 999 were obsoleted by loops involving a syringe and various snarks.

The syringe was named by Jeremy Tan, describing how it injects a glider into a Herschel system.

See also


  1. Tanner Jacobi (March 19, 2015). "Re: Let's find a G-to-X". Retrieved on March 22, 2015.