CATALOGUE, 



SECTION 1. ARITHMETIC. 



WEST GALLERY, GROUND FLOOR, ROOM G. 



I. SLIDE RULES. 



1. Slide Rule, of boxwood, arranged by Mr. Dixon, Lowmoor 

 Ironworks. Aston fy Mander. 



In addition to the lines of the ordinary slide rule this instrument contains : 

 Lines of common and hyperbolic logs and numbers. 

 Lines of sines, cosines, and numbers. 

 Lines of cubes and roots, direct. 

 A copy of Dixon's " Slide Rule Practice " is issued with each rule. 



2. Slide Rule, of ivory, showing the actual and racing tonnage 

 of yachts. Aston $ Mander. 



The length and breadth of beam being " set," as directed in the instructions, 

 the tonnage of yachts of any size is shown as marked. 



3. Slide Rule, of boxwood, adapted to brickwork measurement 

 in all its branches. Aston fy Mander. 



In this adaptation of the rule to brickwork measurements, all the results 

 are obtained by one setting, viz., length and height ; while, immediately oppo- 

 site, any thickness will be found ; the superficial area in square feet ; the con- 

 tents in rods of reduced work, 1^ bricks, in cubic feet, in cubic yards, and 

 the number of bricks required. 



4. Slide Rule, of boxwood, adapted to timber measurement 

 in all its branches, giving the superficial or cubic contents of 

 round and unequal sided timber, St. Petersburg standard. 



Aston fy Mander. 



5. Slide Rule, of boxwood, with reversible slides, movable 

 inverted lines, &c. Aston $ Mander* 



Uses explained in Hoare's " A. B. C. of Slide Rule Practice." 



6. Slide Rule, of ivory, with reversible slides, movable inverted 

 lines, &c. Aston fy Mander. 



Uses explained in Hoare's " A. B. C. of Slide Rule Practice." 

 39508. A 



