206 



Apparatus, Supplees and Materials for General Use. 



No. 51145 



51145. 1:10. 



51151. 1:15. 



51153. 1:12. 



51.145. Levelling Board with micrometer adjustment, Figure, for accurately setting up 

 apparatus which have no levelling screws fitted, and for adjusting at small angles (M. P., 

 Vol. 1, Fig. 73), with small discs for supporting the levelling screws. Without spirit 

 level 



The top is of plane glass in a metal frame; the levelling screw, in the form of a micrometer 

 screw, has a disc graduated in degrees. 



51.146. Parallelepipedic Wood Blocks, 15 cm square, 1, 2, 2 and 5 cm thick 



51.147. Wood Supports, 15 cm square, 0.5, 1, 2, 2.5 and 10 cm high (M. T., p. 9). . . . 



51.148. 2 Support Boxes with hole for gripping (M. T., p. 9), 20x30x40 cm 



51.149. 1 Set of thin wood wedges serving as supports, 6 in set 



51.150. 4 Wide wood wedges, 5 x 15 cm, width of back 0.5 and 1 cm (M. T., p. 10) ... 



51.151. Frame Stand, of oak, Figure (W. D., Fig. 27), 1 m wide, 1 m high, with 8 small 

 and 2 large hooks for suspending pendulums, levers, Magdeburg hemispheres, electro- 

 magnets, etc. The frame can be taken apart. Price does not include experimental 

 apparatus 



51.152. Portable Gallows for suspending heavy objects and for tensile tests, as suggested 



by Friedr. C. G. Miiller (M. T., Fig. 3) 



51.153. Mirror, on stand, Figure, for demonstrating phenomena in the horizontal plane, 

 e. g., Chladni's harmonic figures, before a large audience (M. T., p. 9) 



This mirror is inclined towards the stand at an angle of 45 . 



Flexible Leads, Figure (W. D., Fig. 493 [468]), covered with wool and braided with 

 copper wires at ends. 



Cross-section, sq. mm 1.5 

 For currents to amperes 14 



51.154. - - Length 0.60 m, Price Is. 



51.155. - - Length 0.90 m, Price 1 s. 3 d. 



51.156. - - Length 1.20 m, Price. ..... 1 s. 6 d. 



51.157. - - Length 1.50 m, Price 1 S. 9 d. 



These flcxibles can be thoroughly recommended on account of the convonioncc of manipulation. 

 Thicker leads quoted for on application. 



.~>l.ir>s. 1 Set Flexible Leads, comprising two lengths each of 0.0 and l.l' in and 1.5, 2.5 and 



ti si|. inni cross-section - - 12 lengths in all 



:<l.ir><i. Copper Wire, double silk covered. 



Diameter nnii O.L' 0.3 



Price per kg 16 s. 12 s. 

 Approx. length per kg 3600 1600 



s. d. 



3. 0. 



0. 

 0. 

 0. 



2. 

 4. 

 6. 



0. 0. 8 

 0. 1. 



0.13. 



3. 0. 



1. S. It 



d. 17. d 



Supports and Suspension Devices, for fitting to Lecture Tables: 

 see Nos. 50,096 50,098, pp. 18 and 19. 



Cl. 5578, 111, 1157. 



