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‘10 Stritures on Mr. Collier's 
e. 
ment on an extended feale. The artift and the man of 
feience fhould mutually inform each other: principles will 
then, and not till then, acquire confiftence and correétnefs, 
and their value will be eftablithed on the fureft foundation. 
The precept I inculcate I fhall myfelf follow, to the beft 
of my ability, by communicating, through the medium of 
the Philofophical Magazine, a feries of papers intended as an 
introduétion to a knowledge of the manufacturing of iron in 
this country, with details of the various proceffes in ufe: to 
be followed by a feries of experiments relative to the princi- 
ples of iron and fteel, which have occupied my leifure time 
for fome years paft, and which prefent fome facts not gene- 
rally known, But as it may tend to clear the path, and 
enable me afterwards to proceed with lefs interruption, I 
fhall in this paper confine myfelf chiefly to the correcting of 
fome miftakes into which Mr. Collier, in his Obfervations 
on Iron and Steel, has been betrayed by a want of know- 
ledge in the mechanical procefles now in ufe, and the 
minute practical details of the various modifications of 
iron, Thefe can only be deduced, with certainty, from a 
keen, perfonal, and long continued inveftigation of the con- 
firmed modes of pra¢tice on a large fcale. To {pread infor- 
nation on thefe interefting fubjects, and to correct erronegus 
cpinions, formed from the perufal of writers eminent in 
the feientific walks of life, are the reafons ftated by Mr. 
Collier for prefenting the public with his Obfervations. To 
pafs over his obfervations in filence, would be doing him 
aswell as the public injuflice, fince 1t would be to gid the 
diffemination of that error, which he fo laudably wifhes to 
root out; in his endeavours to the performance of which, 
he furely ought to meet with the afliftance and approbation 
of every one interefted for the welfare and profperity of his 
country. 
One rock on which Mr. Collier fplits, is in ceyfuring and 
quoting the French chemifis, and others, without recollect- 
jng whether the fuel ufed is the fame in France as in 
Britain; 
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