80 
Injurious Manufactories . 
such a manufactory is already established, we would be 
far from advising the magistrate to order its removal : it 
would be sufficient in such cases, to oblige the manufac- 
turer to build very high chimneys, that the disagreeable 
vapours produced in these operations may be dissipated 
in the air. This is particularly practicable for the fabri- 
cation of Prussian blue, and by adopting it one of our 
number has continued to retain in the midst of Paris one 
of the most important manufactories of this kind we 
have, against which the neighbours had already leagued. 
In the report we lay before the class we have thought 
it our duty to attend only to the principal manufactories, 
against which violent clamours have been raised at di- 
vers times and places. It is easy to see, from what has 
been said, that there are but few the vicinity of which is 
injurious to health. 
Hence we cannot too strongly exhort those magis- 
trates who have the health and safety of the public com- 
mitted to their charge, to disregard the unfounded com- 
plaints, which, too frequently brought against different 
establishments, daily threaten the prosperity of the ho- 
nest manufacturer, check the progress of industry, and 
endanger the fate of art itself. 
The magistrate ought to be on his guard against the 
proceedings of a restless or jealous neighbour ; he should 
carefully distinguish what is only disagreeable or incon- 
venient from what is dangerous or injurious ; he should 
recollect that the use of pit-coal was long proscribed, un- 
der the frivolous pretence that it was injurious to health; 
in short, he should be fully aware of this truth, that, by 
listening to complaints of this nature, not only would the 
establishment of several useful arts in France be pre- 
vented, but we should insensibly drive out of our cities 
the farriers, carpenters, joiners, braziers, coopers, foun- 
ders, weavers, and all whose occupation is more or less 
