a oe — ar 
Subsection of Mechanical Sciences applied to the Arts. 65 
not rapidly, yet energetically, in arresting many of those symptoms 
which create most alarm. It seems to counteract the tendency to 
tympanitis, to correct the foetor of the excretions, to prevent collapse, 
to promote a return to a healthy state of the secretions of the skin, 
bowels, and kidneys; in fact, it appears admirably calculated to 
meet the bad effects of low putrid fever. Its employment does not 
preclude the use of wine or other approved remedies. Dr. Graves 
has used it in several hundred cases of typhus, and strongly recom- 
mends its employment in that disease. 
Original Views of the Functions and Diseases of the Intestinal 
Canal, $c. By Dr. O'BEiRNE. 
On Purulent Ophthalmia. By Dr. Evory KEnneEpy. 
Dr. Evory Kennedy gave a report of numerous cases of purulent 
ophthalmia of infants, in which leeching, constant removal of the pu- 
rulent secretion, and caustic applications, modified according to the 
violence of the attack, and, in aggravated cases, the solid nitrate of 
silver, applied to the interior of the lids, had proved most successful. 
A notice of the curved Drill Catheter, invented by Mr. Francis 
L’EsTRANGE, was presented to the meeting. 
Mr. Hawks exhibited to the Section specimens of Harrington’s 
patent Electrizer. — / 
Abstract of Registry kept in the Lying-in Hospital of Dublin. By 
Rogert Coutuins, M.D., late Master of that Institution.* 
MECHANICAL SCIENCES APPLIED TO THE ARTS. 
On Impact and Collision. By Eaton HopcGKinson. 
Mr. Hodgkinson reported to the Section the results of certain ex- 
periments made by him on impact and collision, in continuation of 
those communicated to the Association in the year 1834 on the 
collision of imperfectly elastic bodies. The results were, 
First, That cast-iron beams being impinged upon by certain 
heavy masses or balls of metal of different kinds, were deflected 
through the same distance, whatever were the metals used, provided 
that the weights of the masses were equal. 
Secondly, That the impinging masses rebounded after the stroke 
through the same distances, whatever was the metal of which they 
were composed, provided that the weights were the same. 
Thirdly, That the effect of the masses of different metals impinging 
upon an iron beam were entirely independent of their elasticities, and 
were the same as they would give ifthe impinging masses were inelastic. 
Mr. Hodgkinson also gave the result of some interesting experi- 
ments on the fracture of wires under different states of tension, from 
* Of this and some other communications made to the Medical Section, 
the titles only of which are given in our report, abstracts will be found in the 
copies of the Proceedings of the Association, separately printed for the use 
of the members.— Epi. 
Third Series. Vol. 8. No. 43. Jan. 1836. K 
