midnight
Quitting , therefore , though reluctantly , my observation of the phenomena below me , I turned to the apergion , and was occupied for some two or three hours in gradually reducing the force as measured by the cratometer attached to the downward conductor , and measuring with extreme care the very minute effect produced upon the barycrite and the discometer . Even the difference between 200 and 201 radii of elevation or apogaic distance was not easily perceptible on either . It took , of course , much more minute observation and a much longer time to test the effect produced by the regulation of the movement , since whether I traveller forty , forty-five , or forty-two thousand miles in the course of one hour made scarcely any difference in the diameter of the Earth 's disc , still less , for reasons above given , in the gravity . By midnight , however , I was satisfied that I had not attained quite 1,000,000 miles , or 275 terrestrial radii ; also that my speed was not greater than 45,000 miles -LRB- 11-1 \ 4 radii -RRB- per hour , and was not , I thought , increasing . Of this last point , however , I could better satisfy myself at the end of my four hours ' rest , to which I now betook myself . I woke about 4h . 30m .