240 



Popular Science Monthly 



Lowering a Bridge Without Blocking 

 the Street Traffic 



THE task of lowering a bridge span- 

 ning the canal in Cincinnati with- 

 out seriously blocking the enormous 

 amount of traffic over the span, has 

 presented an in- 

 teresting task 

 for the engin- 

 eers in charge. 

 A large number 

 of car lines use 

 the bridge, and 

 there is much 

 vehicle and foot 

 traffic. To over- 

 come this diffi- 

 culty the bridge 

 has been cut in 

 two parts and 

 while one half 

 is being lowered and put in condition for 

 use, the other portion remains with cars 

 passing over it. Thus the traffic is 

 only partially inconvenienced. This 

 picture shows the elaborate mechanical 

 equipment used in the work. 



The bridge was cui in two parts and while one half was 

 being repaired the other half was being used by cars 



intended for light work have been 

 introduced from time to time, but only 

 recently has a man-sized portable grinder 

 been a reality. A huge motor mounted 

 on a three-wheeled truck supplies the 

 driving energy to the abrasive wheel 



through flexible 

 tubing. In op- 

 eration, when 

 the speed has 

 been adjusted 

 to suit the needs 

 of the work- 

 man, he grasps 

 the handles of 

 the wheel on 

 either side and 

 bringsitagainst 

 the object to be 

 ground at any 

 angle or any 

 pressure desired. Grinders of this type 

 are intended for use in foundries or in 

 factories where there is a great deal of 

 heavy abrasive work to be done. 



A Giant Grinder Which Goes 

 to Its Work 



IF you have an axe to grind, it is no 

 longer necessary to bring the axe to 

 the grinding wheel, for a portable grind- 

 ing wheel of full-sized proportions has 

 been brought into the grinding field. 

 Numerous small grinding equipments 



The grinder is a portable, man-sized one for 

 Ijeavy abrasive work in shops and factories 



How to Get Thin and Fool the Family 

 While Doing It 



EFFORTS at reduction at home are 

 usually futile, because of the want 

 of sympathy ofTercd by the family, the 

 difficulty in securing proper indi\idual 

 diet, the templalion pro\ided by the 

 daily sight of all kinds of food, and the 

 urging of members of the family to be 

 less strict than the physician directs. 



Reduction treatment is easiest and 

 vastly more successful in an institution 

 or at a health resort, where definite diet 

 can be prescribed and furnished, and 

 where, in an atmosphere of routine and 

 obedience, there is less tem|ilation to 

 transgress. There is cN'ery encouragement 

 to persevere through the comnumity of 

 interest felt by every one and the force 

 of numerous good examples of obedience 

 daily before one's eyes. 



L'nless a settled determination and a 

 conscientious effort exist in the mind, 

 there is no use of attemiiting reduction 

 of corpulence. Indultjence in alcoholic 

 beverages, course dinners, extra suppers 

 after theater, etc., defeat all measures 

 that may be taken. These difficulties 

 are oftenest encountered in iieople be- 

 tween the ages of thirty and forty. 



