Intelligence and Miscellaneous Articles. 315 



728 feet. Each strand is wound on a little less than an inch ; in 

 the middle of the horse-shoe it forms three thicknesses of wire, and 

 on the ends or near the poles it is wound so as to form six thick- 

 nesses. With a battery of 4i square feet, the magnet suspended 

 2063 pounds. The effects of a larger battery were not tried. It 

 induced magnetism in a piece of soft iron so energetically as to 

 raise 155 pounds. When two batteries were employed so that the 

 poles could be rapidly reversed, a curious fact was observed. After 

 one of the batteries had been removed, the curvature, with a wei"-ht 

 added, in all 89 pounds, remained suspended and did not fall when 

 the poles were reversed. This effect must have been instantaneous, 

 otherwise the weight must have fallen ; as there was an instant when 

 the magnet could have had no power. It was attempted to decom- 

 pose water by this magnet, but without success.— Ibid. Silliman's 

 Journal. 



MARKING-INK FOR LINEN. 

 M. Henry, senior, recommends the following as a marking-ink 

 tor Imen to be employed in hospitals. 



Take of iron filings 1 pgunj. 



Acetic acid ( Vinaigre de Bois) sp. gr. about 1-052 . . 2 pounds. 

 Mix the iron filings with half the vinegar ; shake the mixture 

 frequently, and as it becomes thick, add the rest of the acetic acid, 

 and or water i i 



Ti , ., .• ; 1 pound. 



Heat the mixture to favour the action of the acid upon the iron- 

 and when it is dissolved, add 



Sulphate of iron 3 j^^ 



Gumarab.c 1 pound. 



I^reviously dissolved in water 4 pounds. 



Mix them thoroughly while hot; these quantities usually give 

 1 1 pounds of product. In order to employ it, the linen is stretched 

 upon a table, and copper characters [stencils?] and a hair-brush 

 are used. — Journal de Pharmacie, July 1831. 



MONTHLY AMERICAN JOURNAL OF GEOLOGY AND NATURAL 

 SCIENCE. 



We have lately received the first Number (for July) of this work, 

 \vhich IS published at Philadelphia, and conducted by G. W. Fea- 

 therstonhaugh, Esq., F.G.S., &c. &c. Of the design, as expressed in 

 the I rospectus, which contains some candid remarks on the state of 

 the cultivation of natural history in the United States, and on the 

 means necessary for its improvement, we highly approve. Of the 

 execution also, so far as the Number before us will enable us to form 

 a judgement, we are happy to express our approbation. Desirous of 

 seeing our Transatlantic brethren the emulous yet generous rivals of 

 the cultivators of .science in Britain, in every department of human 

 knowledge, Mr. Featherstonhaugh's Journal has our most cordial 

 wishes for its success. 



The Number begins with the «' Prospectus," which is followed by 

 an "Introduction," giving some c.\cellent remarks on the Mosaic- 

 history of the Creation, as fully reconcileable with the inferences of 

 2 S 2 geology. 



