46 
A short discussion took place, in which Mr. Stoddart pointed out the 
similarity of form between the course pursued by the lightning-flash and 
that of a long spark from a RuhmkorfF coil when received in the middle of 
a metallic plate. 
Mr. W. W. Stoddart, F.G.S., then shewed a number of specimens 
from Aust Cliffs, collected from a slip that had lately occurred. Among 
them were some fine teeth of Ceratodus gibbus, Acrodus minimus, Hybodus 
minor, Saurichthys ; spines of Hybodus, Nemucanthus monilifer ; scales of 
Gyrolepis Alberti, Pholidophorus, &c, and bones of Ichthyosaurus. The 
teeth of Ceratodus, and one of the Hybodus spines, were especially fine 
specimens. Mr. Stoddart also put before the members the curious fossil 
seeds of Chara medicaginula which he had collected from one or two loca- 
lities in the Isle of Wight. These seeds were so perfect that the spiral 
markings were plainly visible. 
ENTOMOLOGICAL SECTION. 
Tuesday, April 9th. — No report received up to the time of going 
to press. Ed. of Proceedings. 
CHEMICAL AND PHOTOGRAPHIC SECTION. 
Wednesday, April 10th.— Mr. W. L. Carpenter, B.A., B.Sc, in , 
the chair. The attendance of members was small. After the transaction 
of the routine business, 
Mr. Alfred Noble, F.C.S., read a paper upon " Disinfection." He 
regretted that there were not more members present, as he was desirous of 
having a good discussion upon the question, since his remarks were chiefly 
respecting the supply of pure water, and the disposal of sewage, two 
subjects very intimately connected, which it was impossible to discuss se- 
parately. Quotations^ from a series of articles in the Chemical News for 
February and March, 1867, on the " London Water, Past, Present, and 
Future " were read, which tended to show how good the present supply 
* was, having slightly improved within the last few years, that it was 
practically limitless, and that, in consequence, it was undesirable to enter- 
tain any gigantic scheme for bringing water from a distance to the Metro- 
