Boyle WorkdiariesWorkdiary 29Page 3 of 56
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and the Mercury in the Capillary pipe was not near two inches, by which it may appeare that as water ascends in Capilary pipes by so much higher than it does in other pipes [ 'by so much th <by so m> much the higher than it does in other pipes' deleted] by how much the pipes are more slender the quite Contrary happens to {mercury} as we found by compareing this tryall with an other [ 'of the with in the' deleted] wherein the Same {mercury}, the syphon whose longer & shorter leg of the same [ 'o' deleted] bignesse with those of this Syphon, but the small pipe not so[altered from 'to'] slender <thô> the [ '{mercury}' deleted] surfaces of the {mercury} were not neare so much beneath one another as in our present tryall. 2. Letting the Syphon furnish'd with quicksylver as before descend slowly & [ 'in an erected Pos' deleted] perpendicularly into a tall vesell of water <to> the depth of about half a yard or (18 inches) <I>[replacing 'and'] then observ'd (as I expected) that the incumbent water had deprest the {mercury} in the slender pipe about 3/4 of an inch or more which was proportionable to the higth of the water above the surface of the {mercury} in that pipe. But the {mercury} in the longer leg haveing a much wider surface [ 'fa' deleted] was raisd above the former marke scarse manifestly, save that the surface was made a great deale more protuberant; by which it appear'd that [ 'about' deleted] about 14 times as much water in higth was able to depresse the {mercury} in the capillary pipe, as much [ '& no more than it would have done, if' deleted] as it ought to have done notwithstanding the resistance of a Mercurial Cylinder in the long leg, which was many times bigger than the Cylinder of water perpendicularly incumbent on the capillary pipe