46

DEDUCTIONS FROM THE

TRACT 34.

pears to be now somewhat stronger. So that these rangesand times, it may be presumed, are too great in respect ofthose of last year. They are also evidently very irregular ;,owing perhaps to the inequalities of the balls, which wereonly the remaining outcasts from the whole stock we firstbegan with, having been rejected either from their light-ness, or from the irregularities of their surfaces. Andsometimes indeed the ranges and times, here set down,were not very accurately obtained. The mediums of all,except those marked doubtful, are placed at the bottom.

A SUMMARY OF THE EXPERIMENTS ; WITH PHILOSOPHICAI.-REMARKS AND DEDUCTIONS.

103. We have now got so far through this long annualcourse of experiments; and have detailed them in so minuteand circumstantial a manner, as to enable every person fullyto comprehend and make his own use of them ; withoutsubjecting him to the dissatisfaction of having mediums andresults forced upon him, unaccompanied with the fair andregular means of assuring himself both of their justice andpropriety. We are now therefore to make some use ofthese experiments, by pointing out the philosophical lawsand deductions that flow from them, and making such otherremarks as may be suggested by the various circumstancesattending of them, or that may be useful for improving orfurther extending experiments, accompanied with such im-portant consequences in natural philosophy. And for thesebeneficial purposes, it will first be necessary to bring themediums and results together into an abstract, or one com-prehensive point of view ; to form as it were the sure andregular foundation for the future structure we hope tobe able to raise upon them.

OF THE LENGTH OF THE CHARGE.

104. And first we shall deduce the lengths or heights ofthe charge of powder, for every 2 ounces in weight; or the