Popular Science Moiifhli/ 



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Oh, Henry— What Makes 

 Them Go 'Round? 



PRETTY young girls passing 

 store windows in which a 

 new advertising contrivance is 

 being displayed have asked that 

 question; old people have asked 

 it; everybody asks it. It gets 

 attention from all sides. 



The machine recently patent- 

 ed by H. J. Herberts, consists 

 simply of a polished cylinder 

 mounted in an upright position, 

 and resembling a restaurant 

 coffee urn in size and general 

 appearance. Inside an arma- 

 ture-like electromagnet revolves, 

 throwing a strong magnetic 

 field through the thin outer shell, 

 when objects containing steel or iron are 

 thrown against the shell they cling to it 

 and move around and 

 around it along with 

 the magnetic field, in 

 spite 

 Brushes of the 

 fact that 

 the shell itself 

 does not rotate. 

 Articles journey- 

 ing endlessly 

 around the cylin- 

 der are objects of 

 great curiosity. 



If you can define seventy-five of the total num- 

 ber of these words you are a " superior man" 



Then 



Have You a Supermind ? If So, You 

 Can Define These Words 



Motor. 



EPo 



Winding — 



Diagram gives idea 

 of general princi- 

 ples actuating the 

 magnetic advertis- 

 ing contrivance 



Any article which 

 contains iron and is 

 not too heavy will 

 revolve 'round and 

 'rotond the drum 



LEWIS M. TERMAN, professor 

 of education in Leland University, 

 has introduced a new intelligence test 

 which is said to give good results. 



The words in the accompanying list 

 were selected at random from the dic- 

 tionary and arranged according to their 

 approximate difficulty. The person is 

 asked to begin with the sim^plest words, 

 giving their definition and continuing 

 through the list until he can no longer 

 define them. 



The test is based upon the assumption 

 that a person's in- 

 telligence is pro- 

 portionate to his vo- 

 cabulary and that 

 the ability to de- 

 fine a certain num- 

 ber of words may 

 be accepted as an 

 index of the person's 

 vocabulary. The 

 average adult can 

 define sixty-five per 

 cent, of the words, 

 representing a; vo- 

 cabulary of 11,700 

 words, while the su- 

 perior adult, who 

 can define seventy- 

 five or more of the 

 words, commands 

 a vocabulary of 

 13,500 words or over. 



