Fig. 9,
w(z1 + a)−w(0.66(z1−b)−b−a) = 0.33wm + 2wa.
∴ z1 = m−5b.
Similarly we have for the new distance from CPfw to CG1:
0.66(z1−b)−b = 0.66m−5b.
[26] It is to be remembered that these aerodromes were under incessant modifications, No. 4 for instance, presenting successive changes which made of it in reality a number of different machines, one merging by constant alterations into the other, though it still went under the same name. After 1895 the type of the models remained relatively constant, but during the first five years of the work, constructions equal to the original building of at least eight or ten independent aerodromes were made.
[28] “Pocketing” is a form of distortion in which the canvas or silk bags locally in numerous places between the cross-ribs.
The site of these experiments, which was 30 miles below Washington, has been described. The writer is designated by the initial “L”; Dr. Barus, who several times assisted, by the letter “B”; Mr Reed, carpenter, by “R”; Mr Maltby, machinist, by “M”; and Mr. Gaertner, instrument maker, by “G.”