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Popular Srtcncc Monikhj 



The instruments showed that underweight babies produced more 

 heat units or possessed more horsepower than did fat babies 



Measuring the Horsepower of 

 That Baby of Yours 



DR. JOHN R. IMIRLIN, of Cornell 

 University Medical College, has de- 

 vised an apparatus which causes a baby 

 to record its own horsepower. Horse- 

 power is used in this sense merely as the 

 expression of a unit of energy. Dr. Mur- 

 lin dc\isctl this apparatus for use in the 

 study of the energy requirement of the 

 new-born child. 



A baby unconsciously writes the story 

 of its energy by means of its pulse and 

 its breathing. A small cuff is attached 

 to the left leg of the infant above the 

 knee. From this cuff a tube leads to a 

 glass connection, j)assing through the 

 wall of the incubator and finally to a 

 T-lubc on the top of the incubator. One- 

 limb of this tube i)asscs to an air-pump 

 and the other to another T-tube. To 

 the second T-tube a mercury pressure 

 gage (manometer) is connected by one 

 limb and a pressure-bottle to the other. 

 From this bijttle a transmission-tulx' 

 leads to a recording drimi. Thus with 

 each pulse the bab\- makes a record. 



Oddly enough, tjie fattest baby jiro- 

 duced the smallest ilegree of hor.scpower. 

 While sleeping the babies (iroduced an 

 average of .004 of a horsepower. It was 

 determined that the normal heat |iro- 

 duclion of recentK- fed, sleejiing babies 

 lictwcen two months and one year of 

 age is .09 horsepower. 



A Magnet Made from Two 

 Discarded Cannons 



PROBABLY the largest 

 and strongest magnet in 

 I lie world is at \\'iliett's 

 Point, X. Y. It was made 

 by accident. The comman- 

 der of the post happened 

 to see two old fifteen-inch 

 Dahlgren gun.5 lying uiuised 

 side by side on the dock. He 

 conceived of the idea of con- 

 \erting them into a magnet 

 of enormous power by wind- 

 ing submarine cable around 

 them. 



The magnet, which stands 



about ten feet from the 



ground, is eighteen feet long, 



and has eight miles of cable 



around the upper part of the 



guns. It takes a force of 



twenty-five thousand pounds to pull off 



the armature. A crowbar applied to 



the magnet requires the combined force 



o{ four strong men to tear it away. 



Two 15-inch Civil War cannon converted 

 into an electromagnet wliich is so power- 

 ful that it takes a force of twenty-five 

 thousand pounds to pull off the armature 



