ion of ‘‘empties” and ‘‘loads”), and multiplying it by the ing the nut; from this bar also projects a stud or pin, recently patented by Mr. Joseph H. Black, of Colum- miles. and a bolt through the slot holds another lever bar, bia, Penn.- The axle is formed with an enlarged screw- But while this… … through the wheel in line with the recess occupied by would be the foot pounds of work done in hauling a GOODSON’S WRENCH. the key, in which a small tool may be inserted for train over any road. Toobtain this, the average strain driving back the key. on the tender drawbar would have to be obtained…
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