Minutes of Proceedings. 
xxih 
Ordinary Meeting. 
An Ordinary Meeting was held on Wednesday, May 19th, 1915, at 
8.15 p.m., in the Board Room of the South African Association, Church 
Square, Capetown. 
The President, Dr. L. Peringtjey, took the Chair. 
The Minutes of the previous meeting were confirmed. 
Mr. E. Eay, B.Sc, was nominated for membership. 
Dr. A. D. Ketchen and Dr. Hugh Smith were elected members. 
Sir Kendal Franks subscribed the Obligation in the Charter Book as 
Fellow of the Society. 
The following communications were made : 
"The Equivalent Mass of a Spring Vibrating Longitudinally," by 
Alexander Brown. 
The paper deals with the allowance to be made for the mass of a spring 
when a weight attached to it is oscillating under gravity and the tension of 
the spring. The fraction one-third of the spring's mass is correct for great 
added weights; for very small weights the fraction is a little over two-fifths. 
The variation of this fraction is considered theoretically, and data supplied 
to give its value for any weight. Experiments are described confirming the 
theoretical results. 
" The Occurrence of Dinosaur Bones in Bushmanland," by A. W. 
Eogers. 
Dinosaur bones were found in a well in Bushmanland at 112 ft. below 
the surface. The well is in an old valley cut in gneiss and filled in with 
local debris. It seems probable that the climate became dry while the 
dinosaurs lived there, and that since then the valley has been steadily 
filled up. 
Description of the Dinosaur Bones from Bushmanland," by S. H. 
Haughton. 
The bones discovered by Dr. Eogers consist of a maxillary tooth and 
portions of the hind limbs and caudal vertebra of a medium-sized Ornitho- 
podous Dinosaur. They are described under the name Kangnasaurus 
Coetzeei n. g. et sp., which is shown to have affinities with Camptosaurus 
and its allies, and with Mochlodon and HypsilopJiodon. The form is 
certainly younger than Camptosmirus, but no estimate of its exact age is 
given, the evidence being considered to be too insufficient. 
" The Coccidse of South Africa," by Chas. K. Brain. 
The paper, which is the first contribution to a Catalogue of the Coccida 
of South Africa, deals with five sub-families, viz. : Pse^idococcinae, Orthe 
siinae, Goccinae, Monophlehinae, and Margarodinae. Sixty-three species and 
two varieties are described, of which number thirty-two are here dealt with 
for the first time. 
A Note on the Molecules of Liquid Crystals," by J. S. v. d. Lingen. 
