...of the fame kind of ore, has, perhaps, in nooneinft mce been afcertained with fufificient precilion. There are many forts of iron and copper ores which...great expence of fuel ; it is very probable, that by a well conducted feries of experiments, more compendious ways of working t hefe minerals might be fou...

...quantity of the fame kind of ore, his, perri'ps, in no one ¡nttancc been afcrrtamed, with fu(Gcieiu precifion. There are many forts of iron and copper ores which cannot be, converted into malleable mtuls uithcil mncli l.ilxxir, and a great expence nf fuel i it is very probable, that bj a well-conduäcii...

...perhaps, in no one nt >;!••<• been ascertained with sufficient precision. There are many sorts of iron and copper ores, which cannot be converted...malleable metals, without much labour, and a great expense of fuel ; it is very pro. bable, that by a well-conducted series of experiments, more com....

...ore, has, perhaps, in no one instance been ascertained with sufficient precision. There are many sorts of iron and copper ores, which cannot be converted...malleable metals, without much labour, and a great expense of fuel ; it is very pro. bable, that by a well-conducted series of experiments, more com....

...ore, has, perhaps, in no one instance been ascertained with sufficient precision. There are many sorts of iron and copper ores, which cannot be converted...malleable metals, without much labour, and a great expense of fuel ; it is very probable, that by a wellconducted series of experiments, more compendious...

...afcertained with fufficient prtcifion. There are many forts of iron and copper ores which cannot !>e converted into malleable metals without much labour,...minerals might be found out. In our own times, three oew metallic fubftancei have been difcovered *, and their properties abundantly afcertained by experiment;...