TRANSACTIONS OF SECTION I. 549 
the common femoral crosses the ramus of the pubes. The animal recovered 
from this with few symptoms, and two or three weeks later the aorta was 
completely blocked by a second ligature applied just central to the first. In 
every instance the animal survived this, and after recovering from the operation 
ran about as usual. 
In the deep epigastric the flow was reversed, i.e., the blood moved from 
the umbilicus through the superior epigastric downwards. The main collateral 
supply came, however, from the anastomoses between the two circumflex 
vessels (branches of the femorals) with the sciatic and lumbar arteries about 
the upper end of the thigh. Blood-pressure tracings from the femoral artery 
displayed typical damped oscillations similar to those obtained from a normal 
artery when the connecting tube to the manometer is partly clamped. Obstruc- 
tion of the aorta above the iliacs, produced immediately by a single ligature, 
is practically always fatal. 
It is intended to utilise this method in ligature of vessels which is attended 
by grave complications owing to poor collateral blood-supply. An ideal instance 
would be in the case of the abdominal aorta for an aneurism situated below the 
renal vessels. Other less critical examples would be in the case of the common 
femoral or popliteal arteries. This method might prove more suitable than 
plastic operation on the aneurism itself. 
7. Sixth Interim Report on Anesthetics. 
8. Report on the Binocular Combination of Kinematograph Pictures. 
9. Report on Calorimetric Observations on Man. 
See Reports, p. 238. 
10. Report on the Ductless Glands.—See Reports, p. 237. 
11. Report on the Effect of Low Temperature on Cold-blooded 
Animals.—See Reports, p. 241. 
12. Report on the Physiological and Psychological Factors in the 
Production of Miner’s Nystagmus.—See Reports, p. 241. 
TUESDAY, AUGUST 18. 
Discussion on Anesthetics. 
(i) Opening Remarks. By Professor A. D. Water, ’.R.S. 
Professor Waller, after a complimentary reference to the epoch-making 
work on chloroform anesthesia by Professor Martin and Dr. Embley in Mel- 
bourne, discussed some of the outstanding features in connection with the 
dangers of the administration of chloroform. He emphasised the rule that the 
amount of chloroform administered must not be above 2 per cent. nor below 
1 per cent. to be effective. Any apparatus used must be contrived with the above 
object in view. 
