Scientific American Supplement, No. 623, December 10, 1887 by Various
page 56 of 143 (39%)
page 56 of 143 (39%)
![]() | ![]() |
|
partial balance of the lower foreside gradually reduces the strains,
the rudder head may be made of very great service. As a matter of fact, this rudder is 230 ft. in area, and is probably the largest rudder fitted to a warship. The efficiency of it was shown in the turning trials, by its being able to bring the vessel round, when going at about nineteen knots, in half a circle in one minute twenty-three seconds, and a complete circle in two minutes fifty-eight seconds, the diameter of the circle being 350 yards. This result, we believe, is unrivaled, and makes this vessel equal in turning capabilities to many recent warships not much more than half her length. * * * * * FILM NEGATIVES.[1] [Footnote 1: A communication to the Birmingham Photographic Society.] Having had a certain measure of success with Eastman stripping films, I have been requested by your council to give a paper this evening dealing with the subject, and particularly with the method of working which my experience has found most successful. In according to their request, I feel I have imposed upon myself a somewhat difficult task. There is, undoubtedly, a strong prejudice in the minds of most |
|