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:J = Herschel

:jack (p4) Found by Robert Wainwright, April 1984.

	...O.....O...
	...OO...OO...
	O..OO...OO..O
	OOO..O.O..OOO
	.....O.O.....
	OOO..O.O..OOO
	O..OO...OO..O
	...OO...OO...
	...O.....O...

:jam (p3) Found by Achim Flammenkamp in 1988, but not widely known about until rediscovered (and named) by Dean Hickerson in September 1989. Compare with mold. In fact this is really very like caterer. In terms of its 7×7 bounding box it ties with trice tongs as the smallest p3 oscillator.

	...OO.
	..O..O
	O..O.O
	O...O.
	O.....
	...O..
	.OO...

:Jaws A breeder constructed by Nick Gotts in February 1997. In the original version Jaws had an initial population of 150, which at the time was the smallest for any known pattern with superlinear growth. In November 1997 Gotts produced a 130-cell Jaws using some switch engine predecessors found by Paul Callahan. Jaws has since been beaten by the even smaller mosquitos, teeth, catacryst and metacatacryst.

Jaws consists of eight pairs of switch engines which produce a new block-laying switch engine (plus masses of junk) every 10752 generations. It is therefore an MMS breeder.

:JC = dead spark coil

:JHC John Horton Conway. Also another name for monogram.

:J-heptomino = Herschel

:Jolson (p15) Two blocks hassled by two pentadecathlons. Found by Robert Wainwright in November 1984 and named by Bill Gosper. A p9 version using snackers instead of pentadecathlons is also possible.

	.OO......OO..
	O..O....O..O.
	O..O....O..O.
	O..O....O..O.
	.OO......OO..
	.............
	.............
	.......O.....
	.....O..O.OO.
	......OO..OO.
	.............
	.............
	......OOOO...
	.....OOOOOO..
	....OOOOOOOO.
	...OO......OO
	....OOOOOOOO.
	.....OOOOOO..
	......OOOO...

Introduction | 1-9 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Bibliography