Arizona weekly journal-miner., 1901-11-13
Some of the Wonderful In= ventiOnS of the Human Brain That We're Exhib= ited at the Buffalo Ex= position.
Machinery Which Has Some of the Faculties of the Hu- Man Mind Almost Inparted to it-Wonderfu1 Progress of a Decade.

10 IL OnQer1ul HrOQreS
 of a Decade.
 The Washington Patent Record il
 recent issue devotes considerabl
 space to the machinery department O
 the Buffalo exposition, and tells O
 some wonderful inventions of auto
 matic machinery. From the articl,
 in question the following is taken:
 Another machine in the govern
 ment building is worthy of note. Il
 is an automatic engraving machine
 A carbon print photograph is wrap
 ped round a cylinder, picture side
 out, and is then covered with thin
 sheet of celluloid. The picture or
 the carbon print is in slight relief
 the amount of relief varying with the amount of light or shade. As the cylinder revolves an engraving tool cuts fine lines on the celluloid, the depths of the cuts varying in accord ance with the amount of relief in the carbon photograph at the back of it. The celluloid sheet is then fixed to a wood block and is ready to print from. In this automatic machine the varying surface of the carbon print takes the place of the cams that think, and controls the engraving 
 One of the older automatic ma chimes is the famous Jacquard loom. As is usual at expositions, there are several of these at the Pan-American engaged in weaving souvenir pictures. The most noteworthy is one auto weaving at one operation sixteen separate silk souvenir picture ribbons. All the textile industries have become to a large extent auto matic, the continuity of the process lending themselves readily to this de- Knitting machines are familiar example of this.
 Counting machines are another distance in which mechanical machines are coming to the assistance of the human brain. They are an old in vention, but they are gradually being made very handy and compact, and Ire coming into extensive use in con- There are several shown 1t the Pan-American, including one little machine that can be carried in ! coat pocket. It will add, subtract, multiply, divide-in fact, it will think far better and quicker than the average human being.
 Another of the wonderful machines sxhibited is measuring machine that can split hairs.
 One illustration O f the extreme ac- ,uracy of modern engineering is sup piled by a Brown & Sharpe measur- ng machine exhibited in the machin- ery building. Machinists at the pres ent day habituallywork to o9e-thous- indth of an inch; that is to say, about half the thickness of an average hair from a mans head. No machin- st can get employment nowadays in I good factory unless he possesses a guage measuring to one of an inch. The Brown x Sharpe machine at the Pan-Ameri- can measures accurately to one hun 1red-thousandth of an inch, or less than one-hundreth part of the thick ness of a single hair from the head of little Esquimaux Nancy.
 Another slowly perfected invention that is having great effect on mod ern machine industry is the auto natic screw machine. This started put as an ordinary turning lathe. The chief improvement was the in- -ention of what is known as the mon tor or turret tool holder. This holds half a dozen or more tools of different kinds and shapes which can be brought to bear successively on the work, cutting off definite amounts from definite parts of the metal rod hat is held to be operated upon in
 he turning lathe. In this way screws md other small articles are made ex- on what are known as monitor" lathes, by boys who, at the right moment, swing the tools in the 'urret round successively to the work. This stage having been reached, an ingenious inventor devised an arrange nent of cams, known as a cam drum, which automatically brings heproper .ools into play at the right moment. This invention completed the auto natic screw machine in all essential They have now been so much improved that there is hardly my limit to the variety of shapes and ,izes of the small articles that they ,an cut automatically, from ordinary screws up to beautiful balls for the 1all-bearings of bicycles. Stronger telephone exchange lbolishes the telephone girls by throwing their work upon their sub 'cribers, the theory being that the has to wait a few moments while the telephone girl at the ex- ,hange is making the connection, md that the subscriber might just as we'll utilize the waste time for the benefit of the telephone company by making the connection himself. This exchange does not pro luce anything. It simply supplies None of these automatic distributing machines are automatic machines in the proper sense ,f the term. They do not think" like the automatic machines. They will not work by themselves. They will only operate momentarily as the direct re- 'ult of human action. The real auto natic machines are those which pro-