118 



MULBERRY TREE AND SILK WORM. 



or wet coal, on the supposition that, be- 

 cause they are more durable, they will in 

 the end prove more cheap. It is true, 

 their consumption is less rapid; but to 

 produce a given amount of heat, a far 

 greater amount of fuel must be consumed. 

 Wood that is dried under cover is better 

 than wood dried in the open air, being 

 more free from decomposition. 



hour cannot be maintained except at a 

 cost which amounts politically to a pro- 

 hibition. — Penn. Intel. 



ACETOUS ETHER IN DEAFNESS. 



The vapor of Acetous Ether has been 

 recently discovered by Kramer, a German 

 artist, to be a most effectual remedy for a 

 species of this distressing malady, hither- 



We perceive 



to considered incurable 



by the last number of Dunglison's Medi- I fabric, that the article be well rinsed 



USEFUL HINTS. 



Apply common table salt to remove 

 fruit stains from linen before the stain be- 

 comes dry, this will keep it damp until 

 it is taken to the wash; when without any 

 further trouble, or attention, it will en- 

 tirely disappear by the usual process of 

 washing. Spirits of salt, oxalic acid, salt 

 of lemons, are the usual applications to 

 extract those unsightly stains, z>(;n mould 

 or riist,?A\ of which require great caution 

 to be observed to prevent injury to the 



cal Intelligencer, th:!t it has been recently 

 employed by Dr. Bolton of this city, with 

 remarkable success. 



Richmond PVhi.sr. 



SILVER SEPARATED FROM OTHER SUB- 

 STANCES BY ELECTRO-MAGNETISM. 



The late discovery of Baquere, to ex- 

 tract the minutest portions of silver when 

 contained in its ores, bids fair to be of 

 incalculable benefit to this country, where 

 the production of the precious metals has, 

 froni various causes, been much retarded. 

 Electro-magnetism is the power which 

 forces the silver, however tenaciously 

 adhering to its various metals, salts, or 

 acids, and however small the proportions 

 of the same to the other substances may 

 be, even one part in a thousand, to 

 separate, and appear in a pure metallic 

 state. — ^lex. Gaz. 



after the application, till on applying the 

 tongue to it, no acid taste remains. 



Mahogany tables are polished by the 

 use of ivhite soup, white and yellow wax; 

 grate a quarter of an ounce of white soap, 

 hold it over a fire in an earthen vessel 

 with a pint of water until it is dissolved, 

 then add the same weight of white and 

 yellow wax cut into small pieces; as soon 

 as the whole is incorporated, it is fit for 

 use. Clean the table well, dip a piece of 

 flannel into this varnish while warm, 

 apply it to the table as quickly as possible, 

 then let it remain a short time, then rub 

 it in well with a stiff brush in every direc- 

 tion, afterwards with a clean woolen cloth; 

 this will produce a very brilliant gloss. 



Fam,. Mag. 



LIMITS OP SPEED ON RAILWAYS. 



Dr. Lardner has discovered, by experi- 

 ments recently made on the Liverpool 

 and Manchester railway, that the atmos- 

 phere is an opponent to railvvay speed, 

 more formidable than has ever been sus- 

 pected. At thirty two miles an hour, the 

 resistance it offers, is nearly 80 per cent, 

 of all that steam power has to encounter, 

 and it increases in a proportion so much 

 greater than the speed, that there is not 

 the slightest possibility of any such 

 velocity of transit being gained as some 

 (and none among them more than Dr. 

 Lardner, himself) have anticipated. It 

 is ascertained that even forty miles an 



CLARKE ON THE MULBERRY TREE AND 

 SILK WORM. 



This is a large duodecimo volume, em- 

 bellished with appropriate engravings, by 

 John Clarke, superintendent of the Moro- 

 dendion Silk Company of Philadelphia. 

 The book contains a history of silk in 

 Asia, Europe, Africa, and America. The 

 second part treats of the various kinds of 

 mulberry and their culture, on the value 

 of trees, their products, &c. On the worm, 

 its nature, diseases, preventives, remedies, 

 &c. 



The character of the worm from the 

 first day, to the close of its useful life, 

 preparing the cocoons, reeling the silk, 

 coloring, &c. 



The work seems to be a perfect manual. 

 We of course are not prepared to decide 



