58 Mitiv6 Sulphur of Java. 



As this subject is one of much practical importance to the 

 rising arts of this country, and as much interest has been 

 excited in Paris concerning our porcelain clays, we should feel 

 greatly obliged by the transmission to us of any specimens of 

 American porcelain clays, with memoranda of the place, the 

 quantity, the depth at which obtained, the difficulty of obtain- 

 ing, and, generally, all the peculiar circumstances. We will 

 take care that their value shall be acertained, if they appear 

 promising, and a proper return shall be made to the pro- 

 prietor. 



To those of our readers who may not be familiar with this 

 subject, we would however take the liberty to remark, that 

 porcelain clays generally arise from the decomposition of gra- 

 nite, and particularly of that kind which is denominated graphic 

 granite, and which abounds with feldspar. It is, therefore, in 

 the primitive countries that we are chiefly to expect them — 

 such as New-England, and part of the high country of the 

 middle and southern states- 

 It should be observed, that if a clay, otherwise apparently 

 good, burns red, it contains iron, and is unfit for porcelain ; 

 although it may serve well enough for more common and coarse 

 earthen ware. 



Art. VIII. Mitive Sulphur from Java, 



JL HROUGH the kindness of Mr. I. Huntington, recently 

 returned from Java, we have received from that Island some 

 fine specimens of native sulphur. They are very pure, of 

 an orange yellow, slightly shaded with white, and occasionally 

 with red ; some of the cavities are lined with delicate crystals. 

 What gives them particular interest is, that they are believed 

 to be from that " large, and now nearly extinct, volcano, 

 about sixty miles from the town of Batavia, at the bottom of 

 which (of the crater) lie large quantities of native sul- 

 phur, even many hundred tons." It is in the crater of this 

 volcano that the famous lake of sulphuric acid exists, and from 

 which it flows down the mountain, and through the country 



