30G ANNUAL OF SCIENTIFIC DISCOVERY. 



Thov conclndo from tlioso and otlicr oxperimcnts : — 



1. That tilt! venous blood returning from an iiill.anied part con- 

 tains move oxygen than the blood of the sound side, the propor- 

 tion being as 1 : 1.5 or 2.5. 



2. That the venous blood of the inflamed side contains more 

 carbonic acid ; and 



3. That it is to the excess of oxygen in the venous blood, render- 

 in*' it of brisrhter tint, that the increased redness of an inflamed 

 part is due. 



Eniimjled Tissues. — The experiments of M. Bert are of the 

 highest interest, as they show that the tissues of one animal may 

 not only be engrafted on those of another, but that after a time 

 they become supplied with blood-vessels, etc. The following case, 

 wliich has just been published, is very instructive: The tail of a 

 full grown rat was removed from the body, and then inclosed in 

 a glass tube, and maintained for seventy-two hours at a tempera- 

 ture of from -\- 7° to -f- y° centigrade. It was afterwanls deprived 

 of portions of its skin, and introduced into the subcutaneous cellu- 

 lar tissue of another adult rat. Three months afterwai'ds the 

 second animal was killed, and coloring matter was injected into 

 its aorta. This coloring substance aljsolutely penetrated the mar- 

 row of the engrafted vertebrje, thus showing that the tail had 

 been supplied with vessels communicating with those of its host's 

 body. 



Iodine. — Iodine is almost entirelj' wanting in young sea-weed, 

 and it has reached its maximum quantity when the plant is thrown 

 oft' in drift. Fermented liquors and wines contain iodine, but 

 milk is richer in that substance than wine. The proportion of 

 iodine in milk is in the invei'se i-atio of the quantity yielded. Eggs 

 also contain iodine ; a fowl's egg weighing o(> grains contains more 

 iodine than a quart of cow's milk. 



Creosote and Ferment. — A letter of M. Bechamp to M. Dumas 

 mentions that creasote appears to be the agent which most strong- 

 ly opposes the development of organic ferments, but adds that it 

 does not interfere witli the life of ferments or animalcules when 

 they are once developed. 



Beating of the Ileart. — In ascending into the air, the heart-heats 

 increase 5 for the first 3,000 feet, 7 for the next 1,500 feet, 8 for 

 the next 1500, and 5 for each 1500 feet of ascent after that. 

 This is an average increase of one beat for each 100 yards of 

 ascent. 



Sixth Sense in Man. — Dr. Hughes Bennett, in a paper before 

 the British Association (1865), announced that the tendency of 

 modern physiology was to ascribe to man a sixth sense. If there 

 be placed before a man two small cubes, the one of lead and the 

 other of wood, hoth gilded so as to look exactly alike, and both 

 of the same temperature, not one of the five senses could tell the 

 man which is lead and which is wood. He could tell this only by 

 lifting them ; and this sense of weight was likely to be recognized 

 as a sixth sense. 



Iron in the Blood. — M. Pelouze finds that the blood of birds 

 contains, per 10,000 parts by weight, from 3 to 4 parts of iron ; 



