22 
eichomii, tube-builders, a colony of a social rotifer, Connchilus vnlvox, 
and various free-swimmers ; freshwater Polyzoa: Lophopus crystalline, 
Fredericella sultana and Plumatella repens ; Infusoria: Amoeba and 
Fpistylis ; Algae : Volvox ylobator, to be found over submerged grass ; 
Plant©: seed of Nemesia comp acta (expansion of testa). Dr. W. A. 
Kibbler arranged a stand with a brilliant light which illuminated a 
set of photo-micrographs, among which could be identified : Oyster 
Spat, scales of Podura, spine of Echinus (section), etc., etc. 
Electricity. — Gerard Smith, Esq., M.R.C.S., etc., at great trouble 
brought the necessary apparatus for giving a demonstration (which 
was repeated later in the evening) of X rays phenomena. A separate 
room was required, as darkness was obligatory for the experiments. 
Dr. Smith began by showing two of Prof. Crooke’s original 
experiments, demonstrating the movement, under the influence of high 
tension electric impulses, of the residual air molecules in high vacua ; 
and the fluorescence resulting from the collision of the molecules 
amongst themselves against other materials placed in the course of 
the cathode stream (the molecular shadow experiment, and the 
fluorescence of Iceland spar). He then spoke of the fluorescence of 
certain salts under the impact of the X rays, produced outside the 
vacuum tube as the result of the bombardment of the cathode stream 
within the tube, and showed by various means the peculiar standard 
of “ transparency ” possessed by the X rays, wood, vulcanite, coke, 
aluminium, etc., being “transparent;” glass, metals, other than 
aluminium, etc., “opaque.” He brought the interesting experiments 
to a close by showing the skeleton, heart, and movements of 
respiration in a living person. The Theatre. — At 8.45 a move was 
made to the theatre, when the president stated that as soon as the 
committee had decided to hold this exhibition, he could not resist the 
temptation of asking their learned and respected hon. member, 
Lord Walsingham, to be present, and to say a few words of encourage¬ 
ment to the members and their friends. Without the slightest 
hesitation Lord Walsingham kindly promised to be present, and, 
knowing how much his time was occupied with various pursuits, he 
was sure the members would all agree with him in thanking Lord 
Walsingham very heartily for this practical expression of his sympathy 
with their work. He (the president) considered that it was absolutely 
unnecessary for him to formally introduce Lord Walsingham to the 
members and their friends present. To many he was personally 
well-known, to all he was known by repute. His position as the 
leading micro-lepidopterist of the world had brought him into touch 
with those members of the City of London Entomological Society, 
who were lepidopterists, but his wider sympathies and work in other 
branches of natural history were such, that he had long been looked 
upon as one of the best informed naturalists of the day, and his name 
was a household word among all workers in the various branches of 
natural science. He would, therefore, simply ask Lord Walsingham 
to address the meeting. 
LORD WALSINGIIAM’S ADDRESS. 
Lord Walsingham then addressed the members and their friends. 
He said: — “Will you permit one, who has devoted a great many 
years to the study of various branches of natural history, both at 
