" ROTATION." 
379 
YACHTS AND YACHTING. 
SYLLABUS OF LECTURE BY MR. G. F. WATSON. 
(Read January 17th, 1884.) 
Definition. Early vessels. Cruising. Eacing. Eoyal Cork 
Yacht Club. Early incidents. Eoyal Yacht Squadron. American 
yachts. Statistics. Model yacht racing. Summary. 
OVEECEOWDING IN LAEGE CITIES. 
A LECTURE BY MR. W. C. ODGERS. 
(Read January 24th, 1884. ) 
" EOTATION." 
SYNOPSIS OF PAPER BY MR. R. W. WOOLLCOMBE, M.D. 
(Read January 31st, 1884.) 
Introductory remarks. Subject divisible into rotation without 
translation and with translation. Illustration of phenomena of 
rotation without translation is best seen in the gyroscope. Ex- 
periments with gyroscope, and natural laws deducible therefrom. 
Eotation with translation. Singular non-appreciation for so long of 
the principle of the bicycle. Deviations of spherical projectiles found 
to be due to unrecognized rotation, the cause discovered as due to 
excentricity. Singular phenomena 1 caused by excentric rotations 
in excentric spheres, oblate spheroids, discs, and rings projected 
1 Vide (in library of Plymouth Institution, by the author) ' ' An Account 
of some Experiments with Excentric Oblate Bodies and Discs as Projectiles," 
in Proceedings of the Royal Society for March, 1862. 
