xviii

INTRODUCTION.

ing and preserving citric acid, (lime, or lemon juice,)for calico-printing, in order to convey it from the Eastand West Indies , and the Mediterranean, to Britain .See p. 63.

11. In 1809, he established a manufactory of pureyeast, in the Borough, London , but which failed fromthe opposition of the London Porter Brewers. Seepp. 71 , 72, 73, 74.

12. He prepared iodine by a new and exclusive pro-cess. See p. 72.

13. He invented the process for preparing the patentdouble water-proof fabrics. See pp. 82—84, (fee.*

14. In 1827, he invented the mode of topical print-ing of calico, silks, <fec., by the application of thecaoutchouc and naphtha varnish. See pp. 89, 90, 91,92.

15. 1828. He invented and patented the process forconverting iron into steel by means of carburetted hy-drogen gas. See pp. 94, 95.

16. 1826. He invented the process for burning coal,or other tar, as fuel, in fires and furnaces. See p. 97.

* It was generally thought that Mr. Macintosh was entitled to a renewal of hispatent for this invention ; and, that the lawsuit which he gained for infringementof the patent, against Messrs. Everington, Ellis, and others, was preparatory to anapplication to the Privy Council , with this view, particularly as the patent wasvery near expiring when the action took place. It is proper to mention, that thesuit in question was instituted from a truly chivalrous feeling on the part of Mr.Macintosh’s partners, the Messrs. Birleys of Manchester, with the view of vindi-cating Mr. Macintosh’s credit and honour as the inventor, a motive rather unusualamongst men of business, but which, in this instance, was happily crowned withcomplete success.—E d.