Local Geology and Archceolog'j. 83 



The " Arrangement," adopted by our author is, with some slight altera- 

 tion, in accordance with that established by Mohs. The whole series is 

 divided into nineteen "Orders." — I. Acid, 2. Salt, 3. Haloide, 4. Baryte, 

 5. Kerate, 6. Terene, 7. Malachite, 8, Mica, 9. Steatite, 10. Spar, U. Gem, 

 12. Ore, 13. Metal, 14, Pyrites, 15, Glance, 16. Blende, 17. Sulphur, 

 18. Resin, 19. Coal. The sixth and ninth orders are new. In the former, 

 the author includes Graphite, ChrysocoUa, Allophane, &c. The ninth order 

 is introduced for the purpose of grouping together Algamatolite, Serpen- 

 tine, Killinite, and such others as the term Steatite suggests. We deem it 

 right to inform our readers that this arrangement does not correspond with 

 that of the minerals in the Bristol Institution, or of those in the British 

 Museum. 



Under the head of " Observations," appended to the scientific descrip- 

 tion of each mineral, Mr. Allan has furnished ample details of the localities, 

 geological position, and varieties of each species ; and the opportunity 

 which he has had of inspecting various museums on the continent, has 

 enabled him to convey highly interesting particulars on these points. 



Descriptiims of not fewer than ninety-two minerals are given in the 

 appendix, which has been comi)iled with great care and judgment, from 

 the scientific journals which have appeared during the last ten years, both 

 in Europe and America. The valuable information herein contained, has 

 rendered the work an indispensable requisite to the library of the experi- 

 enced Mineralogist ; and we strongly recommend the perusal of the 

 " Manual of Mineralogy" to all who are pursuing the study of this interest- 

 ing branch of natural science. 



DOMESTIC OCCURRENCES. 



LOCAL GEOLOGY AND ARCHAEOLOGY. 



During the past year, some progress has been made towards a collec- 

 tion of specimens to illustrate the Geology of the great Bristol basin j the 

 exact locality from which each has been obtained being marked upon a 

 map, now constructing for tiie purpose, upon a very minute scale, and 

 further particulars concerning the locality being entered in a proper index. 



Hitherto those gentlemen whose lands have been geologized, have 

 afforded the Geologists all the assistance in their power, in providing them 

 with maps, local information, &c. ; and great praise is also due to Messrs. 

 Sturge and Townscnd, the surveyors, for the very liberal manner in which 

 they have furthered the views of the Institution committee. It is much to 

 be wished that proprietors of coal mines and other subterranean works, 

 would aflbrd the same assistance towards the completion of an object so 

 purely scientific. 



'I"hc specimens selected are generally about a foot cube, and give a much 



