190 
Scientific Intelligence. 
without action on infasion of litmus, having the consistence of 
white olive oil, and not easily congealabie. 
46. Remarkable Formation of Ice.^ — While examining some 
subterraneous excavations in a bed of lava, near ISiedermendig^ 
M. Pictet observed, in some places, water falling drop by drop 
on the floor, or against the sides of the cavern. Whenever this 
happened., there was beneath^ a mass rf ice of a certain thickness^ 
although the temperature of the air never exceeded 39°.8, and 
at no time descended to 32°. — Mem. de la Soc. Phys. de Geneve. 
47. Size and Shape of the Globules of Blood in different Anu 
mals. — A number of very interesting results have recently been 
obtained by J. L. Prevost, M. D. and J . A. Dumas, respecting 
the form of the globules of blood of different animals, and the 
effects of transfusing the blood of one animal into another. The 
following are their measures of the diameters of the globules : 
Man, Dog, Rabit, Pig, Hedgehog, Guinea Fig, 
Muscarden, - - - 
Ass, 
Cat, Grey Moiise, White Mouse, 
Sheep, Horse, Mule, Ox, - - - 
Chamois, Stag, . - - - - 
She-Goat, - - . 
4'iVj 
"smo 
T2^bo 
of an English inch. 
But while the globules of blood in diflerent animals viiry iri 
size, they vary also in form. In the mammalia they are all 
spherical, while in birds they are elliptical, and vary only in the 
lengths of their greater axes. They are likewise elliptical in all 
cold-blooded animals. They found also, that the colourless 
globule which exists in the centre of the particles of blood, has 
the constant diameter of 75 ^^ 50 ^^ animals, and 
whatever be the form of the globule which contains it. — In their 
experiments on the transfusion of blood, they obtained many in- 
teresting results. When animals were bled till they fainted, 
they died when they were left alone, or when water or serum of 
blood,' at the temperature of 100 Fahr. was injected into their 
veins. If, on the contrary, the blood of an animal of the same 
species was injected, every portion of the blood thrown in, reani- 
mated the exhausted animal ; and when it had received as much 
as it lost, it began to breathe freely, to take food, and was finally 
