688 



Micros cop i cax 



Essays. 



faithful wknefs, and mew that the world was made, as the fcrip- 

 tures were written, for our inftru&ion ; and find the creation of 

 God is the fchool of chriftians, if they ufe it aright. 5 '* 



Of Opake Objects. 



Ores and minerals afford an immenfe variety of very beautiful 

 and fplendid objects. From amongft thefe the obferver may 

 felecl the peacock, or coloured copper ore, green cryfiallized 

 ditto, lead ore, cryfiallized ditto, cryflals of lead, fmall grained 

 marcafites, coloured mundic, cinnabar, native fulphur, needle 

 and other antimony, mofs copper, &c. A mixture of fmall 

 pieces of ores, Sec. of different kinds, produces a pleafmg effecl. 

 Sands, in general, exhibit fomething not difcoverable with the 

 naked eye. Sand from the fea-fhore is often intermixed with 

 minute (hells, particularly that from Rimini, in Italy. Mr. 

 Walker has publifhed a fpecimen of the fmall microfcopic (hells 

 which are found on our own coaft. From this work we learn, 

 that there are fhell-fifh as fmall as the minuteft infects, and 

 poHejOfed of beauties, of which we can form no conception till we 

 have feen them. Mr. Walker's work is -entitled, " A Collection of 

 the minute and rare Shells found on the Sea-more near Sand- 

 wich." T here is a fand from Africa full of fmall garnets. The 

 ketton, or kettering Hone, is a pleafing object ; when examined 

 by the microfcope, we find the grain of it very different from that 

 of other flones, being compofed of innumerable minute balls, 

 'which barely touch ea*h other, and yet form a fubflance much 



harder 



* Jjuj' s Lectures on the Figurative 'Language of the Holy Scriptures. 



