300 Dr. Holland on the manufacture , &c. 
della Guardia, are on a small scale ; their situation is a singular 
one, at the height of 1600 feet above the level of the sea. 
The present conductor, and, as I believe, the chief proprietor 
of the establishment, is Signore Ansaldo of Sestri, a man 
of intelligence and activity. 
The produce of the sulphate of magnesia, as far as I could 
ascertain from enquiries on the spot, does not at present 
exceed if cwt. per week. It might doubtless be increased to 
a much larger amount, from the abundance of the materials of 
manufacture. The colour and general appearance of the salt 
are good, and M. Mojon has found it by analysis to be a very 
pure sulphate of magnesia. It is used pretty extensively in 
§ractice of Ita^y^unler ®^larae of the Sal 
Inglese; and might, in the extension of the manufacture, be- 
come an article of very considerable profit to the proprietors 
5 19bfm : 9ld£ * 9dn ° 98u 9 
Before concluding this paper, I may add, that I have been 
informed of an analysis by Vauquelin of the pyritic ore of 
the Monte della Guardia ; but, from the want of sufficient 
references, 1 have hitherto been unable to ascertain the results 
asil j|9snBfio zh .lo^YnBrn dtouoifu oloabsl eat 
of this examination. 
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t rio!lBn.iniBX9 ol beiffindua'^IBnii asrf sd .. 
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^nobno J ni gnosgruB 'lo sgelloD Ib^oH odt lo r 
r .isdnism b 
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eori&iBaqqB ilsiB oiam ol nigsd ago! bnid of 
t 9J9lqniOO 891198 ill' I0b£293 0: W9rV £ fltiw “ Hif-; 9 1 j 
arii moii s .89gri£d::f . l ' - ggoigoaq orft banirn 
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