3? 2 Martial Ether— ^-Miscellaneous. ' 



ticular has exported the greatest quantity of such cloth. 

 The fault does not He with the process, hut arises from the 

 ignorance of some bleachers, who have made use of the oxy- 

 genated muriatic acid without knowing how to appreciate its 

 effects. When the stuffs "have been incompletely bleached 

 by this process, they labour under the serious inconvenience 

 of retaining a wine tint after being maddered. Let bleach- 

 ers acquire some notions of chemistrv, and these inconve- 

 niences will soon give way to the supenor advantages of the 

 Bertholian process. 



Messrs. Descroizilles add, that care must be taken not to 

 employ soap in bleaching cloths intended for printing. 

 Cloths well bleached by any process, but finally soaped, will 

 never receive a perfect impression or maddering, unless, be- 

 fore they are printed, they be cleaned with great care from 

 the oil left by the soap. It cannot be taken off by the most 

 careful washing, and, it absolutely requires new alkaline 

 leys* 



Thus the discovery of M. Rerthollef, when properly em- 

 ployed and without the interference of soap, certainly de- 

 serves to be preferred to the old process, which requires 

 much more trouble, and besides is not practicable in winter. 



MARTIAL ETHER. 



M. Tromsdorf has maintained sulphuric ether, when di- 

 gested over red oxide of iron, to be a very good medicinal 

 preparation as a tonic and antispasmodic. M Cadet, a 

 chemist of Paris, has endeavoured to ascertain from his own 

 experience the reality of the action of this fluid upon the 

 metallic oxide ; and it results from his experiments, that ether 

 never acts upon the red oxide of iron unless it still con- 

 tains some acid ; and in this ease a sulphate of iron is form- 

 ed, which is gene' a 11 v precipitated in such a manner that 

 the presence of the portion retained by the ether is only 

 manifestedJjy the most sensible reagents. 



MISCELLANEOUS. 



Mr. Cuthbertson, No. 54, Poland Street, philosophical 

 instrument-maker, and member of the philosophical socie- 

 ties of Holland and Utrecht, has in the press his work on 



Practical 



