204 List of Patents. 
_ and increasing the durability of, breakwaters, mole-heads, piers, fortifications, 
lighthouses, docks, wharfs, landing-places, embankments, bridges, or pontoon 
bridges, and also of adding to the security and defence of harbours, road- 
steads, anchorages, and other places exposed to the violent action of the 
wayes.”—11th December 1841. 
30, To Roperr Hour of Manchester, in the county of Lancaster, cotton 
spinner, and Roprnson Jackson of Manchester, aforesaid, engineer, “ cer- 
tain improvements in machinery or apparatus for the production of rotary 
motion for obtaining mechanical power, which said improvements are also 
applicable for raising and impelling fluids.”—11th December 1841. 
31. To Witt1am Hitt Darker senior, and Wiit1Am Hitt Darker 
junior, both of Lambeth, in the county of Surrey, engineers, and WILLIAM 
Woop of Wilton, in the county of Wilts, carpet-manufacturer, “ certain im- 
provements in looms for weaving.”—14th December 1841. 
32. To ArcHIBALD TemPLeETON of Lancaster, in the county of Lancaster, 
silk-spinner, “a new or improved method of preparing for spinning, silk and 
other fibrous materials.’’-—16th December 1841. 
33. To James Cottey Marcu of Barnstable, in the county of Devon, sur- 
geon, “certain improved means of producing heat from the combustion of 
certain kinds of fuel.”—16th December 1841. 
34. To CuristopHER Dumont of Mentz, in the kingdom'of Germany, but 
now residing at Mark Lane, in the city of London, gentleman, being a com- 
munication from abroad, “ improvements in the manufacture of metallic 
letters, figures, and other devices.”—16th December 1841. 
35. To Morris West RutuveEN of Rotherham, in the county of York, 
engineer, “a new mode of encreasing the power of certain media when 
acted upon by rotary fans or other similar apparatus.”—16th December 1841. 
36. To Henry Avcustus WEtts of Regent Street, in the county of 
Middlesex, gentleman, being a communication from abroad, “ improvements 
in machinery for driving piles.”—17th December 1841. 
37. To Henry Boortu of Liverpool, Esq., “ improvements in the method 
of propelling vessels through water.”—17th December 1841. 
38. To Joun Hatt of Breezes Hill, Ratcliff Highway, in the county of 
Middlesex, sugar-refiner, “ improvements in the construction of boilers for 
generating steam, and in the application of steam to mechanical power.’”-— 
17th December 1841, 
39. To Henry Browne of Codnor Park Iron Works, in the county of 
Derby, iron manufacturer, “improvements in the manufacture of steel.”— 
18th December 1841. 
40. To Witt1Am NewrTon of the office for patents, 66 Chancery Lane, 
in the county of Middlesex, civil engineer, being a communication from 
abroad, “ certain improvements in engines to be worked by gas, vapour, or 
steam.”’—20th December 1841. 
