Hudsons Horse Power Slide Rule
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Hudsons Horse Power Slide Rule
Hudsons Horse Power Slide Rule
Hudsons Horse Power Slide Rule


Hudson's Horse-Power Computing Scale Slide Rule.

Slide Rule Rare Stanley London.

Horse Power Computing Scale.

Detailed instructions for its use are in the 1878 edition of W F Stanley’s ‘Mathematical Drawing Instruments.

Excellent condition.



Sold. Please email for Post and Packing, my charges are not excessive.