The Sun. — 1851-04-19 (London, England)

MAKING TEA.—Dr. Lardner, in his treatise oil heat, remarks that vessels intended to contain a liquid at higher temperature than the surrounding medium, and to keep that liquid as long as possible at the higher tempers' tore, should be constructed of materials Which are the worst radiators of heat. The tea-urns and tea-pots are beat adapted for their purpose when constructed of polished metal, and worse when constructed of black porcelain. A black porcelain tea-pot is the worst conceivable material cot that vessel, for both its materials and colour are good radiitors of heat, and the liquid contained in it cools with 01 greatest possible rapidity. On the other hand, a bright metal tea-pot is best adapted for the purpose, because it is the worst radiator of heat, and therefore cools as slowly as poll' Bible. A polished silver or brass tea-urn is better adapted to retain the,heat of the water Shan. one ,pf a. dull.brown colour, such as is commonly used. A tin kettle retaies the heat of water boiled in it more effectually, if it be kept clean and polished, than if it be allowed to collect the smoke and soot, to which it is exposed from the action of the fire. When coated with this, its surface becomes rough or black, and Is a powerful radiator of heat. BENEFIT OF ADVERTISINO,—Of all the facilities for business afforded by newspapers, the advertising columns afford the greatest. They put it in every man's power to send his business-card into all houses and families; to make himself ever present, to > peak for his own cause, whenever the discussion of a subject interesting to himself comes 51P• If he is a dry goods dealer, and in the family sewing circlet the want of any article of clothing, or if any ornament 11 spoken of, the ready newspaper tells the story, and directs them where they may at once supply themselves. The stove-dealer, the coal-dealer, the milliner, tailor, shoemaker; grocer, baker, and, in fact, every tradesman or dealer, whose craft ministers to the comfort or necessaries of a family or individual, finds his best and surest friends in the newspape,r. The dullest times are precisely those when a man should so" vertise the most. If the customer has little money to ex' pend, he -very naturally looks about him to see where the 1 ttle can be disbursed to the most advantage. To rosin about town and make inquiries, costs more than it comes to; consequently, that tradesman who publishes his terms and h's wares, is sure of ten times the amount of the sum invested. The papers that are full of advertisements are not the best to make an announcement in; twenty to one if your advertisr ment is not overlooked; but those journals that contain plenty of local news and general matter, which attract the public mind, and whose columns are not crammed with ad' vertisements.  MELANCHOLY SUlClDE.—Considerable excitement was created in Wakefield yesterday, by a rumour, which unhappily proved but too well founded, that Mr. Henri Illingworth, of the firm of Illingworth and Hicks printers and booksellers, had committed suicide by cutting his throat. It appears the rash act was perpetrated in the pzivy adjoining the house, in Burton-street Deceased had been indisposed for some days previously, and is supposed to have perpetrated the rash act in a tit of despondency. He was for many years an active member of the board of streets commissioners, by whom his loss will be deeply felt. Some neighbours observed that he appeared rather wild and unsettled in aspect on Thursday, but no apprehensions were entertained of the fatal catastrophe which so shortly ensued. JVoßefield Examiner.