II 
worker in collecting material would be constant. The 
measurement of this average time is blocked by the 
difficulty of marking an individual insect as it issues 
from the nest. The lecturer had triumphed over this 
difficulty, and invented methods of measuring the 
average duration of a wasp’s (or bee’s) absence from 
the nest without marking the individuals. One method, 
appropriate to the early morning or late evening, gave 
very consistent results—that the duration of a wasp’s 
voyage at those periods of the day was from ten 
minutes to a quarter of an hour. The duration 
seemed rather shorter for hive bees and longer for 
humble bees. Another method proper to the central 
portions of the day, when a regular flow into and out 
of the nest had been set up, gave a different result. 
The average length of a wasp’s voyage at midday 
periods proved to be more than half-an-hour. It 
should seem that the apportionment of tasks at different 
hours was not the same. In the course of his address 
the lecturer adverted to some curious habits of wasps, 
which he had noticed while collecting his statistics. 
On Friday, February 6th, the Annual General 
Meeting was held under the presidency of Sir Samuel 
Wilks, Bt., F.R.S., the President. The Report of 
the Council was read and adopted. The President, 
Officers and Council were elected. 
The meeting was resolved into an Ordinary 
Meeting. Mr. Charles R. Darling, A.R.C.S., 
A.I.C., gave a lecture on ‘‘ Electrography, or the 
Photographic effects of Electricity ’’ illustrated 
with experiments. The lecturer explained that the 
name ‘‘Electrography’ was applied to processes in 
which an image was obtained upon a suitable medium 
_ by passing an electric current from one conducting plate 
to another through the medium. When one plate is 
a coin and the other is zinc and a sheet of damp 
