were very few lectures on nature photography, and none on scientific subjects -
X-ray photography, microphotography or optics.
fewer lectures on colour photography than in the 1920s, but cine photography
remained popular , including:
A Talk on the
West Indies [illustrated
with lantern slides and 350 ft of ciné
were demonstrations of the epidiascope and flashlight photography, lectures
on the paper negative, bromoil and other
printing processes and
a Meeting of Miniature Camera workers, and a lecture:
The Small Negative - Is it Worth While?