FACTS AND OBSERVATIONS. 
561 
Relation between Water and Solid Matter in different kinds of 
Milk. 
Human Subject 
Water. 
889*08 
Solid matter. 
110-92 
Cow ..... 
864-20 
135-80 
Goat 
844-90 
155-10 
Ewe 
832-32 
167-66 
Mare 
904-30 
95-70 
Ass 
890T2 
109-88 
Sow 
818-00 
182-00 
These tables, which enable one to readily draw a comparison 
between different kinds of milk. 
show that 
sow's milk con- 
tains nearly 50 per cent, more nutritive matter than that of 
the cow, and it is therefore probable that sows' milk may 
be especially useful in those maladies in which milk is 
prescribed. — Med. Press and Circular , Mai/, 1869. 
Bromide of Potassium. — Dr. Namias, of Venice, has 
discovered that after the administration of bromide of potas- 
sium as a medicine, it can be detected in the brain, the lungs, 
and the liver, as well as in the blood . — Journal of the Society 
of Arts, May 20, 1870. 
Preserved Meat. — During a lecture on the preservation 
of food, at Dresden, Dr. Stein produced a tin canister, of 
good size, containing butcher's meat, which had been pre- 
served by Appert's method nineteen years ago. When 
the canister was opened, the meat was found to be as fresh 
and full of flavour as when it was first placed in the tin 
canister . — Chemical News . 
Picric Acid and Ozone. — If picric acid be projected 
into a jar of ozone, it is found that an instantaneous explosion 
takes place. This may lead to new applications of ozone as 
an explosive agent for powders prepared for the purpose, 
although the whole question of the existence and properties 
of ozone is still very obscure . — Journal of the Society of Arts. 
Ozone. — A method has been exhibited by Mr. Loew, 
at a meeting of the Lyceum of Natural History in New 
York, by which he claims to be able to obtain ozone in 
any quantity. He assumed that, during a certain stage of 
combustion of gas, ozone was generated, which was after- 
wards destroyed in the upper part of the flame. By tapping 
the cone of light at the right point ozone can be drawn off. 
This was done by blowing through the flame of a Bunsen 
burner, and collecting the product in a long glass jar. There 
