SLIDE-RULE.
McLeod, T H Instrumental calculation: or a treatise on the sliding rule, comprising every thing
necessary for a full understanding of the nature and use of that instrument, and adapted to the ready comprehension of the mechanic, merchant, and farmer, for whom it is designed. By T.H. McLeod.
Middlebury CVt.J: George Smith,publisher.
1846. oa (See next card) ®@ :