Knives, Ozark Bear Claws

it just looks like an eight inch long by one inch thick piece of wood. It can be carried in the pocket and can be used as a yawara stick until you feel the need for more drastic measures. Ihen it becomes two razor-sharp knives held one in each hand and hard to argue with. 

The wood components are six four inch long by one inch wide by 1/4 indi thick pieces. Three pieces go for each end. The fom outside pieces are hollowed out l/8th of an inch, leaving l/4th of an inch of uncut wood around the three sides. One knife blade handle is epoxied into the top half of one and the t ttom half of the other, then all the pieces are epoxied to make an unbreakable bond. Care must be used to hollow out the blade holding sections so they fit sm ly. This is so they will hold together until purposely pulled apart. 

Notwitbsianding the very satisfactory accomplishments of modern artillery, there yet remains a great opportunity for improvement in its efficiency. This branch of military science should receive a greater share of the attention of our scientific men, for if cannon are to be constructed doubly efficient to any now in use, we cannot, without imminent danger, shut onr eyes to the fact. 

Now if wc increase tbc strain snfliciently to pro-dun fracture, by driving the wedge Htill deeper. Fig. J, it will be obsevved that tlie inner spaces will he completely severed, while the outer remains compar-fttivi ly sound. 

The law has been found that in cylinders of metal, the circumferential strain on the different pai-ts varies inversely as the squares of the distances of the parts from the axis. According to this ratio a two-inch gun with two inches of metal, will be internally fractured l efore the exterior receives one-twelfth part of the strain causing the fracture. Of course increasing the thickness still more would add very little to its strength. 

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