British Association for the Advancement of Science. 313 
Rev. F. W. Hope read a paper on Noxious Insects occurring 
in 1838. These were a-beetle (Anthonomus pomonus) which 
attacked the blossoms of apple trees; an aphis, which has injured 
apple trees, hop plants, and wheat; and the Tipula Tritict (or 
rather Cecidomyia Tritici ),a small dickeroue insect, whose attacks: 
on wheat while. escent for: many years past, are hon comin 
= - Section E. Medical Science. 1 
A paper was -_ ‘by Mr. T. M. Greenhow, on the beneficial 
action of mercury rapidly introduced, in certain cases of Neuralgia. 
Mr. R. M. Glover read a paper on the functions of the rete mu- 
cosum and pigmentum nigrum in the dark races, and particularly 
in the Negro; with observations on a ~— on ae" same subject, 
by Sir Everard Home. 
ia the next paper, Dr: John Reid gave an account of an experi- 
l investigation L of the finite. of the ag 8 Pair of 
iad 
A paper, by J Mr. N. Par, on the law of recovery aha mortality 
in Cholera Spasmédica, was read by Dr. R. D. Thomson. - From 
the tables which Mr. F. has prepared, may be deduced the solu- 
tions of the following problems. 1. The mean duration of the 
disease: 2. The mean future duration of the disease at any pe- 
riod.. 3. The probability of dying at any period of the disease. 
Mr. James Blake then read a paper on the action of various 
substances on the animal economy, when injected into the Veins, 
in which were detailed experiments with various substances and 
their effect on the vascular system; measured by an ingenious in- 
Strument, which the author called a Heemadynamometer, an in- 
strument by which he was enabled to detect the pressure of the 
blood in the arterial system, by meaiis of a column of mercury, 
contained ina bent glass tube, which could be connected with 
the arteries, and which was attached to a graduated scale. 
Dr. Yelloly (the chairman) showed-a model of an improved 
acoustic instrument, to assist in cases of partial deafness. A re- 
port upon its value may be expected at the next meeting. 
Dr. Reid gave a brief notice of his abana on the quantity 
of air required for respiration. 
Dr. Inglis read a paper a phrenological remarks on the 
Skull of Eugene Aram. 
Vou. XXXV.—No. 2. 40 
