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XI. Analysis of the Arseniates of Copper , and of Iron , described in 
the preceding Paper ; likewise an Analysis of the red octaedral 
Copper Ore of Cornwall; with Remarks on some particular 
Modes of Analysis . By Richard Chenevix, Esq. M. R. I. A. 
Communicated by the Right Hon . Sir Joseph Banks, Bart. 
K. B. P. R. S. 
Read March 5, 1801. 
SECTION I. 
ARSENIATES OF COPPER. 
The endless diversity which the hand of Nature has diffused 
through all her works, even when she makes use of the same 
primitive materials, must sufficiently convince us, that, whatever 
accuracy we may attain in the knowledge of the latter, the 
means which she employs to form her combinations are still 
secret. The intellectual eye may indulge in the contemplation 
of hypothetic systems, which itself has created, and which it 
alone can behold ; but, how far removed must they ever be 
from truths, evident to our senses, and supported by palpable 
experiments. 
To follow Nature through the minutiae of her labours, and 
Tehold her reproducing the same primitive materials in many 
different shapes, has always been deemed a less splendid achieve- 
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