...table of comparisons of his observed pressures with the theoretical values he should have obtained ' according to the hypothesis that supposes the pressures and expansions to be in reciprocal proportion '. (a) 78 79 FIGS. 78 and 79. Experiments on Boyle's Law. His results, having regard to the difficulties...

...(atmospheric) 29j-£ 10 6% + Z9Y8 = 35% 8 15% + 29^ = 44% 6 29%+ 29^ =58% From these results Boyle formed the hypothesis that supposes the pressures and expansions to be in reciprocal proportion. If this is so, then the numerical values of volumes and pressures multiplied together will always be...

...(as other Springs are stronger when bent by greater weights)." He then calculated " what the pressure should be according to the Hypothesis that supposes...pressures and expansions to be in reciprocal proportion," and found very good agreement between the calculated and observed values, for values of the pressure...

...The right-hand column in figure 8 is captioned (in its printed form): "What that pressure ought to be according to the Hypothesis, that supposes the...pressures and expansions to be in reciprocal proportion." Note that no corresponding values in these two columns agreed exactly, although one reading in the...

...and C, exhibiting the pressure sustained by the included air'. In column E we find 'what the pressure should be according to the hypothesis that supposes the pressures and expansions (volumes) to be in reciprocal proportion'. An additional column F has been added; this is the product...

...about twice as great as that it had before, obtains a spring twice as strong as formerly" and later " the hypothesis that supposes the pressures and expansions to be in reciprocal proportion " was found to be verified by experiment. The book under review, however, claims that Boyle, although...