42 APPENDIX. 



enormous, as greatly to detract from the profits of the manufac- 

 turer. On this subject I find the following note in Tilloch's Phi- 

 losophical Magazine, fur January, 1816. " According to Messrs. 

 Leans' report for December, the average work of 33 engines was 

 19,333,126 pounds of water lifted one foot high with each bushel 

 of coals consumed. During the same month, the work done by 

 Wolf's engine, at the W heal Vor, was 46,907,793, and that at 

 Wheal Abraham, 47,622,040 pounds of water lifted to the same 

 height with each bushel of coals. " 



The embarrassment and loss sustained by the defective steam 

 engines employed in the water works of Philadelphia, have been 

 so great, as to render one on the improved principle very desire- 

 able. Steam engines are applicable to the draining of extensive 

 swamps. espeeiaiSy where they lie a great distance from the near- 

 est outfall, and at the same time the land which lies between the 

 low grounds and the outfall, is many feet higher: so that drains 

 are obliged to be cut very deep, and to a great distance; and Mr. 

 W. Walker, of Horncastle, in England, has published, (1812), 

 an essay, showing, by means of tables, the number of acres that 

 may be drained by different sized engines, with the prime cost, 

 and annual outgoings; a work that will be extremely useful to 

 all those who have occasion to employ them for the purpose. 



Not only might the agricultural, but the manufacturing inter- 

 ests of the United States be materially promoted by the officer 

 taking proper measures to procure, or encouraging ingenious or 

 useful artizans to emigrate from Europe, particularly in those 

 branches of business that languish for want of mechanics. Among 

 others, 1 may mention one of great consequence, viz. earthen 

 ware of the finer sort. Even porcelain could be made, as the 

 materials for it abound in the United States; and some of them 

 in the vicinity of Philadelphia. France and Germany impose 

 no restrictions on emigration, and the ingenious artists of both 

 those countries would be a great acquisition. Government, by 

 means of such an officer, will have the power of becoming ac- 

 quainted with the residence of ingenious men in the several arts, 



