Boyle's Law

pressure	1/p	height	p x v
37.8	0.026455	13.5	510.3
35	0.028571	14	490
34	0.029412	15.5	527
31	0.032258	16.5	511.5
30	0.033333	17.2	516
29	0.034483	18.5	536.5
26	0.038462	20	520
24	0.041667	22	528
22	0.045455	24	528
20	0.05	29	580