474 List of Patents. 
Silas Bent, March 7, a wheel to turn under water. 
John Baptiste Aveilh6, March 1 6, a horizontal wind mill 
Abraham Du Buc Marentille, March 18, a wreck raft. 
Abraham Du Buc Marentille, March 18, a sea sitting chair. 
John Staples, jun. March 18, a power obtained by the rising and 
felling of the tide, to give motion to all kinds of machinery. 
John Staples, jun. March 18, submarine passage, or hollow in- 
verted arch. 
John Cottle, March 21, a machine for cleaning clover seed. 
David F. Launay, March 21, an improvement in time pieces. 
George Hunter, March 24, improvement in the process of manu- 
facturing sea salt. 
Peter De La Beharre, and J. B. M. Picornell, March 24, im- 
provement in the mode of obtaining antiseptick gas. 
Edward Marquam, March 28, improved house fan. 
Thomas H. Rawson, April 4, antibilious pills. 
J. Richardson, April 4, improvement in his evaporating furnace. 
W. How, April 6, improvement in a cooler or condenser of vapour, 
John Stevens, April i 1, improvement in producing steam. 
Daniel Brewer, April 22, improvement in a ruling machine. 
B. Platt, April 27, improvement in heating and boiling water, 
Eliphalet Beebe, April 27, improvement in the mode of con- 
structing vessels with crooked keels. 
Matthew Barney, May 4, machine for deepening channels. 
William Hopkins, May 13, improvement in building boats. 
G. F Saltonstall, May 14, a roiling machine for cleaning cotton, 
Daniel flsley, May 14, improvement in distilling spirits. 
Richard French, and Join- T. Hawkins, May 17, improvement in 
cutting grain and grass. 
John J. Hawkins, May 17, improvement in the pentagraph and 
parallel ruler. 
Burgiss Allison, May 17, improvement in the application of the 
principle of rectifying or improving spirits. 
John Clarke, May 19, machine for pumping. 
John W Godfrey, May 25, improvement in working the bellows 
of a furnace or a forge 
T Aiden jun May 2 r, expediting the manufacture of common salt. 
Lemuel J. Kilborn, June 4, improvement in the method of dis 
tilling or making alcohol, 
J Biddis. T. Bedwell, and W. Mitchell, June 7, improvement 
In extracting the effective matter contained in barks, See., for dyeing, 
