220 



Apparatus, Supplies and Materials for General Use. 



N.I. :.i Km 



51412. 1 : 2. 



51416. 1 : 10. 



51414. 



51.400. Spray Flask (Fresenius') (W. D., p. 60 [54]) . . . . 



51.401. Hardened Filters Per set of 50 



Diameter cm 4 7 11 15 24 



Per 10 2V d. 3V 2 d. 7 d. 10 d. 1 s. 6 d. 



51.402. Filter Paper, medium thick, absolutely white and specially pure; also suitable for 

 liquids difficult of filtration, 58 X 58 cm size. Price per 100 sheets 



51.403. Gas Washing Flasks, Bunsen's. 250 500 ccm capacity 



0.0.10 0.1.0 



51.404. Combustion Boat, porcelain, 40x5 mm 



51.405. - - idem, larger, 62 x 7 mm 



51.406. Bent Tubing Per kg 



51.407. Spherical Tubes (M. T., p. 11), with 123 bulbs . . Per set (3) 



6 d. 7V 2 d. lOVs d- 



51.408. Combustion Tubes, thickness of wall, abt. Vio th of the diameter, in lengths of 1 in. Per kg 



51.409. U-Tubes (desiccating tubes) (M. T., p. 11). Per set of 3 



80 130 180 mm length of limb 



0.0.3 0.0.4 0.0.6 



51.410. Stirring Rod, glass, 25 cm long, with round-fused ends 



51.411. Overflow Pipettes Per set (9) 



1 2 5 10 20 25 50 100 200 ccm 



4 d. 4 d. 4 1 /,. d. 5 d. 6 d. 7 1 /. d. 9 d. 11 d. 1 s. 3 d. 



51.412. Pipette, for small vessels and tubes the lower orifice of which is plunged in a liquid 



Burettes (Mohr's). 



51,413. 



25 



V: 



in 



50 

 V. 



75 100 ccm capacity 



Vs V ccm graduation 



with pinch cock, see Fig. 51,119, p. 203. 



1 s. 7 d. 2 s. 6 d. 3s. 4 s. 6 d. 



51.414. -- with glass stopcock, Figure. 2 s. 8 d. 3 s. 6 d. 4 s. 4 d. 4 s. 8 d. 



51.415. Floater for above 



51.416. Demonstration Gas Burette (Bunte's), modified by Bischbieth, Figure (Ztschr. f. 

 d. phys. u. chem. U. 15, 1902, p. 74), 100 ccm capacity, graduated in fifths of a ccm, 

 with stand. The burette tube has at the top a branch tap, emission tube and funnel 

 for filling, with a simple tap at the bottom. The rubber tubing can be closed by a 

 pinch cock. With platinum wires 



51.417. Eudiometer (Bunsen's). 300 500 800 mm graduation 



0.3.2 0.4.0 0.5.6 



.1 ,418. 6 Brushes for reagent glasses, beakers, boiling flasks and measuring glasses (M. T., p. 11) 



51.419. Picein (Walter's): a cement for assembling physical apparatus; quite insoluble in water 

 and alcohol (Drudes Annalen d. Phys., Vol. 18, 1905, p. 860). Per 200 grams . . . 



51.420. Various Materials for general purposes (as suggested by F. C. G. Miillci ; see No. 50,254, 



p. 40) 



51.421. Glass Pearls, abt. 3 1 mm diameter (M. T., p. 11) Per kg 



51.422. Glass Plates, round, ground matt one side, 50 210 nun diameter (M. T., p 10). 

 Per set of 7 



s. d. 

 0. 0. 7 

 0. 3. 5 



0. 13. 



0. 0. 4 



0. 0. 5 



0. 2. 



0. 2. 



0. 3. 3 



0. 1. 1 







0. 0. 3 



0. 5. 6 



0. 3. 



'0. 0. 8 



1. 4. 



0. 9. 

 0. 2. 



c. 10. o 

 o. r>. o 



0. 3. 3 



( I. 



