19 
THURSDAY, JANUARY 22np, 1903. 
A faturalist’s Ramble on the Sea 
Share. 
(With Lantern Illustrations.) 
F. MARTIN DUNCAN. 
(/n this case as in others in which experiments or Lantern 
LMustrations form such an important part of the Lecture, tt ts 
impossible to give any adequate abstract of it without a repro- 
duction of them.) 
WEDNESDAY, FEBRUARY 18rTu. 
Grabelling in Mid- Air, 
BY 
May ERIG) STUART BRUCE, M.A, 
T the outset Mr. Bruce dwelt upon the great developments of 
rial navigation of late years, and in particular alluded to 
the way in which the operations of the late war had silenced the 
criticisms of those who grudge national expenditure on erial 
navigation. Referring to some of the tragedies with which recent 
advance in eronautics has been marked, Mr. Bruce said that 
temporary failure, and even the martyrdom of brave men in the 
cause of science, could not stop the natural law of progress, and 
the first British airship had crossed the Metropolis from the 
Crystal Palace to Harrow, without hitch or accident of any kind, 
Then the lecturer came to some experiments. War balloons, 
he told his audience, were made of gold-beater’s skin, which, 
however slight it might appear, was an admirable substance for the 
