430 Gleanings. 
ably introduced. The same reason and policy that prompt the 
offer of premiums for useful things of home invention, would 
warrant the introduction of things which have been recently in- 
vented and patronized by agricultural societies abroad. Satisfied 
that glass milk pans (on which the manufacturer should indicate 
the capacity of the vessel) would be a valuable acquisition to our 
dairy women, we respectfully suggest the importation of a dozen, 
and the offer of a premium to the glass manufacturer who shall 
first produce them in this country at a cost that will justify their 
being brought into general use. It has been seen in an interesting 
and valuable "Essay on the Management of Holstein Dairies," 
published in the Farmers' Library, that there the dairy women 
are allowed one dollar a year for " pan money," and charged for 
all they break^ yet they always " make by the operation." Let 
us have glass milk pans. — Farmers^ Library. 
Marks of Sheep. — The sheep, cattle and horses, which run on 
the common pastures in the Shetland Islands are all marked on 
the ears to distinguish individual property. In the island of Unst 
there are as many as three hundred different marks. Mr. Willson, 
in his coasting voyage round Scotland, says: — " When any new 
person desii'es to have a mark, he has one assigned and appropri- 
ated to himself, which must be publicly advertised or made known, 
to ensure that no one else has already selected the same. He 
then pays half a crown for registration, which sum goes to the 
raai*ntenance of the poor. But if he requires to take even a 
lamb from the hill-side for family use, he must warn his neighbors 
of his intention, that they, if they please, may go with him to see 
that he helps himself to nothing but his own." 
Artificial Iceing. — An invention for generating ice by artificial 
means, has just been discovered in London. The ice is produced 
by means of a powder composed of salts, ammonia, and various 
chemical mixtures. This powder is placed in a simple apparatus, 
something in the shape of a churn, but small in size, and being 
mixed with water, is kept in motion by a rotary process around 
the vessel of water or wine to be cooled. In a few minutes, and 
at a very trifling expense, the water or wine is sufficiently cooled, 
and if kept a few minutes longer in the vessel, would be actually 
frozen. The most inexperienced in chemical experiments can 
produce the required results, which in fact require nothing but the 
labor of the hand for a few minutes. At sea, and in climates 
where ice is a costly luxury, we should think this invention would 
be an invaluable one. 
