238 



NA T U RE-STUD Y RE VIE W 



[1 



2:5- 



-May, 1916 



mouth of the sack can be drawn tight with this puckering string. 

 When it is so drawn tight, the flap that has been sewed on will fold 

 over and cover the hole. Put on a couple of buttons so that the 

 flap may be buttoned tight over the hole and so keep out rain. 



Reinforce the lower corner of the sack by sewing on an additional 

 thickness of the cloth, and then sew on a double strip of cloth three 

 inches long, to one end of which is fastened an ordinarv harness 



Fig. 5. Rucksack from rear, 



snap. In the middle of the mouth under the center of the flap, 

 sew on a four inch square of the cloth doubled to reinforce this 

 point, and then rivet on, or have the harness maker sew on a piece 

 of leather holding an ordinary harness ring. Sew to this ring tw< 1 

 straps twenty-four inches long. Next sew a small ring onto a short 

 strap. On the other end of the strap, let there be a buckle. Make 

 two of these short six inch straps. Punch holes in the ends of the 

 long straps attached to the ruck sack so that they may fasten into 

 the buckle of the short straps. The short straps are now attached 

 to the long straps, the rings of the short straps are snapped onto 

 the lower corner of the ruck sack. The straps pass over the 

 shoulders when the ruck sack is worn, and the long straps are 

 hitched up in the buckles to a comfortable length. 



