3184 Pipettes, Dr. Cobbett's pattern, as used for standardising antitoxins, carefully calibrated, stem graduated 



in 5^ cubic centimetre. 



Nos. . . . . i 2 



Point A to B . . i 1.5 



Stem B to C . . i to 1.5 1.5 to 2 



Price .. .. 2/6 2/6 



Nos. .. .. 7 8 



Point A to B . . 4 4.5 



Stem B to C . . 4 to 4.5 4.5 to 5 



Price .. .. 3/- 3/- 



3185 Pipette, automatic, with Friedrich's patent stopcock for rapid delivery of a given quantity. 



Capacity . . . . . . . . 10 15 25 50 100 c.c. 



Price . . . . . . . . SI- Sj- 5/6 6/- 6/6 each. 



3186 Pipettes, automatic, new form, the bulb at top is ground to fit and receives the excess of fluid ; this 



can be transferred back to the pipette by turning the' bulb in line with a hole at top of pipette (see 

 Fig. II.). 



Capacity . . . . . . . . . . 10 25 50 c.c. 



Price . . . . . . . . . . 6/- 6/6 7/- each. 



Any other size made to order. 



3187 Pipettes, automatic, new form, double, the tube at back of stopcock is connected with the reservoir, and 



the stopcock is arranged so that when one pipette is emptying the other pipette is being filled. 



Capacity . . . . . . . . 10 25 50 100 c.c. 



Price . . . . . . . . 151- 16/- 18/- 20/- each. 



Any other size made to order. 



CROSS STRET HATTCnST GARDETST, E-C 





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