74 | Scientific Intelligence. 
ator of air at each stroke of the piston, and in more recent Arias 
-a portable steam pump which, under a pressure of two atmos- 
pheres, could move 2500 to 3000 liters an hour. The. mean 
amount used was 150 liters an hour e organisms were ee 
ment of any eo! present, in which process the boeiliog 
became clouded. The method is one gmail: by Dr. Miquel in 
the Annuaire de Montsouris for 188 trials in 1884 were 
made at the Theodule Pass, near Zermatt, 3322™ in clevation, 
above the limit of perpetual aed on the Aletsch glacier, 29005 
-and in part at the summit o e Niesen, 2366™, situated on the 
ges. 
Qn the Aletsch glacier, aap 15-17, one trial of 500 liters of air, 
gave no organism; anot of 800 liters, afforded one “ maigre” 
Bacillus subtilis; one of "250 liters, a single organism of the 
family Tor ulaces ; one of 50 liters, a single Micr ococcus—about 
which there was some doubt. e thus obtained from 2000 liters 
of air, at a height of about 3000 meters, two Bacteria (a Bacil- 
lus and a Micrococcus) besides one of the Torulaces. In the 
second series of experiments, at the St. The one Pte September 
6, 7, one Bacterium termo was obtained from 3 0 lite ers, or thet 
cubic meters of air. In contrast with this pee te pur ity, t the a 
at Berne gave him in one trial hundreds and even thousands a 
the cubic meter ; and among the organisms . ~ ti case there were 
444 microbes to the cubic meter, in another 
On the mountain of Niesen, in the last = ‘July and first of 
August, rain, snow and a severe storm, complicated the trials. 
600 liters of air, under these conditions, ave 4 Bacteria (all of 
-one species) ; <n in another trial, 4 sli for 1725 liters. 
Adding the two, it makes 3 to 4 Bacteria to the cubic meter. 
With si Hic - the Beoars being of a single species, the author 
states that on the plain in 1881, M. Miquel found 14 Bacilli to 
79 of Microcoocus and 7 of Bacteria; and the author had a similar 
result at Berne. 
ndocch reports also other similar results from different 
localities, and observes that the purity of the air of the mountains 
8 far greater than had been es from ns trials of Pasteur 
ne others; that it is not excee by the air over the ocean, 
from which Commander Moreau obisinad according to a com- 
munication from Dr, Miquel in the Semaine Medicale ‘of March 6, 
_— five to six Bacteria to a cubic meter. 
Description of an impregnated uterus and the uterine ova 
ny Echidna hystrix.—Professor Ricuarp Owen (Ann. Mag. 
N. H., V, xiv, 373, Dec., 1884), refers to pan papers in the Philo- 
hical Transactions of 1865 an 1880, on reproduction in the 
Echidna, and his account and figures in the latter paper illustrat- 
ing a specimen in which the left uterus contained three ova, the 
dargest 6™"= in diameter. He then gives a description and figures — : 
Ye 
