MISCELLANEOUS SUBJECTS AND TABLES. 371 



the good it does — includes a majority of the hawks and 

 owls, among them being the following species and their 

 races: March hawk, Harris's hawk, red-tailed hawk, red- 

 shouldered hawk, short-tailed hawk, white-tailed hawk, 

 Swainson's hawk, short-winged hawk, broad-winged hawk, 

 Mexican black hawk, Mexican goshawk, sparrow-hawk, 

 Audubon's caracara, barn-owl, long-eared owl, short-eared 

 o\vl, great gray owl, barred owl, Western owl, Richardson's 

 owl, Acadian owl, screech-owl, flammulated screech-owl, 

 snowy owl, hawk-owl, burrowing owl, pygmy owl, fer- 

 ruginous pygmy owl, and elf-owl. 



The class in which tJie hartriful 3.x\A the beneficial qualities 

 about balance each other includes the golden eagle, bald 

 eagle, pigeon-hawk, Richardson's hawk, Aplomado falcon, 

 prairie falcon, and the great horned owl. 



The /larw/til c\2iSS comprises the gyrfalcons, duck-hawk, 

 £harp shinned hawk. Cooper's haw^k, and goshawk. 



HOW PATENTS ARE ISSUED. 



Patents are issued in the name of the United States, and 

 under the seal of the Patent Ofhce, to any person who has 

 invented or discovered any new and useful art, machine, 

 manufacture, or composition of matter, or any new or use- 

 ful improvement thereof, not known or used by others in 

 this country, and not patented or described in any printed 

 publication in this or any foreign country before the inven- 

 tion or discovery thereof, and not in public use or on sale 

 for more than two years prior to his application, unless the 

 same is proved to have been abandoned ; and any person 

 who by his own industry, genius, efforts, and expense has 

 invented and produced any new and original design for a 

 manufacture, bust, statua, alto-relievo or bas-relief, or any 

 new and original design for the printing of woolen, silk, 

 cotton, or other fabrics, any new and original impression, 

 ornament, patent, pattern, print, or picture to be painted, 

 printed, cast, or otherwise placed on or worked into any 



