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As there is room left in the box that contains the 
model, we have put in fome little fpecimens of fea 
coal. 
N° A. I, 2, 3, different forts of fea coal, or ra- 
ther ftones diffolved, and turned to coals. 
N° B. I, 2, fea coal, fuch as is burnt here. N°. 2 
is the beft. N° 3. is the fame coal turned to black 
lime. This you may be convinced of, by diffolving 
it in water, and mixing it with white lime. 
N"* C. I, 2, 3, 4, feveral degrees of bad coal, 
which produces a dangerous fmoke that occafions 
fainting fits. N° 4. is the worft, and is ^laid by for 
the ufe of forges, whenever it is found. 
N° D. is a kind of Clinker, extradled from the 
afhes of fea coal. That which produces the greateft 
quantity of it is reckoned the beft. 
If the Society fhould be defirous of further in- 
formations concerning the fea coal, we muft beg to 
be favoured with particular queftions ; but let it be 
remembered, that we are not within reach of fuch 
helps as chemiftry would afford, nor can elucidate 
the matter by experiments. 
IX, Account 
